Am i pregnant? Do i have a uti? Whats hapoening to my body?

Ok so, my boyfriend and I had unprotected sex last week Saturday! I am on my birth control pills but I did miss one day prior to that Saturday, yesterday we did it again and right after we realised I had forgotten my pill for the day before so (Tuesday ) I forgot (Wednesday ) we had sex and I took Wednesday's pill and Tuesdays same day but after sex! Around Monday the beginning of this week I started to get a sort of stinging sensation when peeing, it only comes right at the end sort of when I've completely emptied my bladder, im really scared and I just need advice. Please don't be horrible I know we should have used protection I know we were stupid.