Well my last menstral was January 25th, and since then nothing. No period for the entire month of February. Needless to say I am a roller coaster of emotion. Back in November the same thing was going on and they performed an ultrasound and nothing looked abnormal however I was also not pregnant.. and since then my period has come and gone when ever, no specific cycle. I've been testing like crazy and of course again I am not pregnant. I have another appointment with the OB next month and I pray to god they firgure something ANYTHING out.. I'm so tired of getting my hopes up, tired of the millions of questions rattling around in my head and no answers. Depression has officially set in and I don't know if it's even worth trying anymore.. good luck ladies. I wish you all the best.