Just as an update: I haven't had any mood problems since the pseudo diagnosis, and decided not to take the new medicine. I'm pretty sure it was a misdiagnosis. I feel like it is best to not see the same practitioner again as I would get crap for not taking the medicine. My hemoglobin (iron) was low just a week after my period ended, and I think the natural variance is that hemoglobin is lowest right before your period, so it should have been at its highest at the time it was tested. My big suspicion is that the causes for my previous moodiness were vitamin deficiencies causing anemia. I have been recently taking daily b12 vitamins, and my mood has been a whole lot better. I don't think I have PMDD, just low iron before my period. Last time on the day before my period as I was starting to get irritable, I ate a double serving of tilapia and rice which halted and calmed the irritability, so no problems occurred. It is now probably 2 days before my next period starts and I feel fine, not irritable. I just need tested for deficiencies. I fix the deficiencies, and I am all better. Simple.

Disclaimer: I do not know for sure what the range is on hemoglobin variance w.r.t. monthly cycle, so it could be a negligible amount. I couldn't find out the range without buying anything, unfortunately.