i had a child 3 yrs ago and after i had my child i didnt have a period for almost 10 months but i was not pregnant, finally i did begin to have one every 3 months for a year and then it began to come randomly about 2 times every month, just last month i have noticed that everytime that i have a orgasm i bleed and i was wondering why is that, also why have i not become pregnant yet when i have had unprotected sex all this time after my first child