Meh... I had my first at 23. I finished college fulltime with a baby, wife that barely spoke english ( no job) and a 45+ hour a week job.

Suck it up. Life will suck for a bit... but you'll be glad you endured when it hits about 3 years old.

http://www.crisispregnancy.co.uk/unplanned_pregnancy.php

If you two have any aspirations of keeping the child she should get medical advice on that immediately.

Anti-depressants can hurt the unborn child and lead to developmental problems. Going off or changing the Anti-depressants can have really bad result for herself, not to mention the general havoc a pregnancy puts on a female body, hormones and all. There is Anti-depressants that are considered safe for pregnancys but she should check with a doctor.

On the overall situation, I have to say it doesn't sound very good. She has mental problems, wich is never a good thing for a child to grow up around and you don't seem too keen on having a child yet, even speaking of resentment for your missed opportunities.

My two cents on the matter is: If you can't love and accept this child and be there for it without resenting it ot it's mother, then you should not have it.Making a child feel unwanted and creating conflict between the two people that would be most important to it, you and it's mother is one of the worst things you can do to it. (Barring sexual, physical and emotional abuse etc. of course.)

I'm sure for most of your plans and wishes there would be a solution. There is lots of people who put themselves through college/university despite having children, it's not impossible. It might have to be locally, or she might have to be willing to go with you, but there's usually a way to work things out if you want to. And yes, both of you are young but I have a friend who is a 22 year old with two beautiful girls that are two and four years old and she is a wonderful mother despite being young, so it depends on the person.

If you are not ready to do any of this you should consider abortion or adoption.

Well considering the pain and life-altering bodily changes a woman goes through in the course of pregnancy and giving birth, I think it's easy to see the logic.  That said, I disapprove strongly of abortion in 99% of circumstances.   And the only reason you have given is you don't want to accept the consequences of your own actions which is, frankly, quite selfish.  And as for you resenting her for messing with your life plans if she has the baby, consider how much she will resent you if you talk her into aborting the pregnancy when she wanted the child to be born.  That could easily be a wound that will never heal.

Two things to consider is that for one, it IS possible to care for a family (what you would basically be doing) while studying.  It takes a lot of work and focus but you can do it.  Contrary to popular belief, a pregancy doesn't ruin your life outright.  Second, have you two considered private adoption?  If neither of you are really ready to raise a child in your minds but she doesn't want an abortion,  you can privately arange for adoption of the child.  

I can't believe that most people here are talking about aborting the baby rather than putting it up for adoption. I'm sure the child would appreciate being alive.

What if the girl wants to keep it? He is going to have to pay child support if that situation occurs. Honestly OP convince the girl to get an abortion and explain to her how having a baby will wreck both of your lives. If you don't have an education/skill and no work experience you will have a hard time succeeding in life and the kid will end up having a hard life.

Damn this is definitely a hard situation for you but at the end of the day you can't deny that it was your own fault.
I still wish you the best for the future though!

I'm past my 30s and I don't feel ready for a child. I don't think there's a right age for that. But when it happens, it happens. I think the best choice is to focus on the positives, hype yourself up and work hard to prepare yourself and be the best parent you can be. That's what I would do, I hope.

Also, for the little you described of her, she doesn't seem so bad. I known worse. Maybe you should try to give her a chance. Know her deeper. See what her virtues are and try to work out the problems. Communication is always key. Know that no one is perfect, and no one is 100% sane either. Everyone has their mental challenges. And conditions such as depression is something that can happen to anyone. Never say never, Life is very cruel and even the most resilient person can end up needing a talk with the psychologist eventualy.

We did use contraception. 

But I was under the impression that an abortion and living with the guilt and what if's was punishment enough.

But hey, that's just me

Sorry but if you don't really like her and shes not into education like you are, she should abort.