I forgot to mention that I am currently on progestrone to lengthen my luteal phase. It didn't do exactly what it was supposed to last month, the doctor thinks it's because I have trouble absorbing it so she increased the dosage. There are other, rarer, causes of a short luteal phase, so we'll see what happens this cycle.
I did some more research, turns out clo.mid and h.c.g is a treatment for LPD because sometimes the body fakes ovulation and for all intents and purposes it looks like ovulation occurred and progestrone is produced, but it may in fact not have occurred.
Oh well, here's hoping this cycle works out.