Over a year ago my ex boyfriend and I were having un-protected sex and i'm now with my new boyfriend and we are trying for a baby except i'm not quite sure if I have caught stds from my ex boyfriend.. During sex with my new boyfriend of over a year it hurts inside my vagina then after sex it starts to burn then I go to urinate and it really burns whilst urinating.. We have been trying for a baby for about 3-4 months.. Although the last 2 periods I have had were late and i'm never late.. Could I be pregnant?? I'm so scared that I could be infertile.. Please help!