TMI but I do need advice

Lindsey

So.... my boyfriend and I had sex multiple times and yes he did cum inside me I’m on the pill and have doubled up when needed and even plan b I’m nervous, my uterus is cramping when I go to the bathroom and I know that way to early of a sign to be pregnant cause that sign happened the day after sex..... could it be Uti? I really don’t want to be pregnant and I don’t think I am. Help any advice?