Welcome To 'Ask A Doctor'. Please Type Your Question Here...My

Welcome to 'Ask a Doctor'. Please type your question here...My boyfriend & I have not had sex but we did do other things & the possibility that his precum has gotten inside of me & has made me pregnant has been on my mind for a couple days. My period is usually super irregular but these past few months it has been regular & I am currently on day 31 which means I've missed it. Also i've had back pain on my lower right side & I can feel this stinging going from my belly button to my bladder which may be related to pregnancy or just a UTI? Help please.