Ovulation tests

Ok girls! Im new so im gonna start at the beginning! I got preg for the first time in Jan. I had a natural m/c in Feb. :( In April I got preg again! But in May I had a m/c and a D&C. Thay called it a blighted ovum. Where a baby never develops. I talked with the doctor and he said wait one cycle then start trying again. Well my period never came. So I went to the doc cuz i was having some pain. He found a 5cm cyst on my left ovary. I went back last week and the cyst has gotten smaller (2.5cm). I was looking for some advice. Me and my husband are ttc. I finally started my period for the first time after the D&C on the 19th. It lasted till yesterday. I had my period for a week and 4 days!!! Im so glad its over!! I was supossed to ovulate tomorrow. But im guessing since I bled for so long I will O a little later right? I am taking ovulation tests so hopefully those will help. The doctor also siad he will put me on pregestrone the next time I get preg. Has this helped for anyone? I hope it works!! Also I was woundering if the cyst will hurt the baby or hurt my chances of getting preg? Sorry for all the questions I just like to hear others experences and what you think about it. Im really hoping that the 3rd time is a charm and I can get preg and go on to have a healthy baby!