Few questions about pregnancy confused?

I am on the pill and have been taking it every day same time, I have noticed though, because when I am not on it I have bad periods. Mostly why I am on it , other then not wanting to be with child. So this month very sore breast, cramping for a good week if not more, uterus very sore since the beginging of the month during sex. Feeling I have to pee, but not sure if its because my Uterus is swollen. I started my green pills 3 days ago and started to slightly spot not much more of a wipe, but small clots. Very small. Does anyone know what is going on ? Or advice. I will be soon going to a ob gyn. Its a free clinic. I have to fill out the paper work. I guess my question for the fact I started my green pill would there be a way I could get pregant? Also wondering because of my family history do I need to undergo some type of surgery to correct this? Most of my family has had surgery for correcting at age 20+ I am 37 years old