Update: Went in at 10am this morning (to a different doctor than I had talked to yesterday). This doctor was initially skeptical about giving me a shot, saying that is generally more used towards different circumstances. He then went on to say that rather than that, he had a couple ideas for pills, but we'd follow through and figure it out at the end.
After telling him how tired the headaches had been making me (sleeping 11-12 hours per day), even though I didn't have a sore throat, he ran blood tests to ensure everything was ok there relative to a bacterial or viral infection of some sort. All the tests came back good.
We then discussed possible treatments, and me having no clue what was the best, I simply told him to try what he thought would work best. He wound up giving me 3 shots, as well as a couple prescriptions (one is a muscle relaxer, the other is a beta blocker). As of now, I don't particularly feel the headache, but I'm pretty sure I'm still "high" on the shots they gave me. My goodness gracious, 5 minutes after I got the shots, I just about fainted they hit me so crazily.
I also got some more ibuprofen, as the doctor said I should continue taking that as well. So here's the hoping I still feel better in the morning. I'll make sure to take all the pills through the prescription (10 days worth), because the last thing I need is for it to come back.