So. I am already a mother of a 18 month old boy and my husband and i are ready for another child. I have been off birth control since august and i have not had a period AT ALL since. I am gaining weight, always tired, and my husband says i've been very difficult to deal with that my mood is always doing a quick 360. I have taken many tests and all have been negative. I've planned on seeing my doctor only to hear i have to wait another week n a half to get in and my mind is going in circles. I need some understanding of what may be going on. three months and still no period but still no positive test... what could be going on?