Advice?

I’ve been peeing every two hours and my bladder muscle is always sore. I had a blood test taken 2 weeks after Alex and it was negative. I don’t have a uti and I feel like my bladder is swollen. Has anyone had this before? Should I still worry about pregnancy. Used the pull out method( 19 days ago) a week after my period (three weeks ago) on the pill but when I had sex it was on a break when I was waiting for my new pack to arrive.