underage and having sex

first off please no one judge me or lecture me in the comments. hi...i’m 16 in august and today i had protected sex with this boy who i’ve know for about a year. we used a condom but eve says i have a 15% chance of pregnancy today. i don’t think the condom broke but as soon as he finished he took it off and flushed it. also i felt down there and it didn’t look like male cum i don’t think...if you know what i mean. it was mostly mine i think? is there still a chance i could get pregnant? should i not stress about it since i didn’t see male cum when i felt and looked?