What should I do if I had sex 2 weeks post giving birth (and other questions..)?

I didn't really finish reading because I feel sick. Don't take it in a bad way but i have two kids and after I had them them both the last thing on my mind was sex. I tore with both of them and had stitches with both of them and I was hurting bad and really sore for about a month and had sex until 3 months after. I don't really think you're pregnant but it would be better to talk to your doctor just to be in the safe side.