Squirting

So, my boyfriend was fingering me and I felt like I had to pee, then I sat on his face and he was eating me out and I just felt like I couldn't hold it anymore and splash 😂I wasn't expecting it because no guy has ever made me squirt although I've made myself do it before. But it freaks me out because I feel like I have to pee 😭 lol can anyone explain squirting to me? I've done research, and my boyfriend liked it but I still kind of feel awkward about it.