I have several questions. Last May I had a tubal pregnancy and had my right tube removed. A month later I got the depo shot. I didn't like the effects so, I never went back for my second shot. My periods have been irregular and more frequent except in the months of July and October were I had no period. I was having 2 periods in 2 weeks, but my periods are starting to space out now. I would like to know how the surgery and depo shot have affected my in any way. Also I do track my period but since my period has been irregular I do not know exactly what days I am ovulating on. I did have sex 7 days before the day I was supposed to ovulate. I heard that sperm can survive for up to 10 days, is this true and if so how likely is it for me to get pregnant even though all this has happened in the past 8 months?