peeing vs an orgasm

So I am new to being sexual. I haven't had sex all the way yet but me and my boyfriend have been doing things like fingering and blow jobs etc. one night he was fingering me and it felt really good. I was going crazy and all of a sudden I had a strong urge to pee and I was scared if he kept going I would pee on him so I stopped us and went to the bathroom. I came back and he started fingering me again because I really wanted to cum and the peeing urge came again. I figured it had to be something else because there's no way I had to pee again within 15 minutes so just to be safe I stopped us and told him about it and he's a dude so of course he never experienced it. I just wanted to know from other people's experiences if something like this has happened. I don't know if it's normal and if that's just me about to orgasm and it feels like I have to pee. I have no idea. Please leave your advice and opinions. Thank you!