I am 45yrs old. Experiencing irregular periods esp last mo (March 27). After an extremely painful period I made an appt with my gyn; had an ultrasound, which showed nothing but a possible (peanut size) fibroid cyst. After an internal, my dr noticed that the uterus was thicker and believes I may have edometriosis but wants to wait another month or so before deciding on laproscopy. My cycle is usually 23 -26 days. At 28days, my next period would have been due April 24. In the past whenever I was late, I was pregnant. I have a 15yr old and have had three losses in the last 10 yrs. I did 2 home preg tests - negative. I am cramping, very bloated and have trouble sleeping. Could I be pregnant or starting menopause.