I need help! condom problem!

so... I'm 16 and yeah I'm having sex. I was ready for the big step and i took it. I have been In an 8 Month relationship. we always use condoms. the last time we had sex when he took "it" out of me the condom didnt look right. like the jiz looked like it wasn't in the top of the condom like it usually is. I'm 16 guys, I don't want to tell my parents about this and i end up being not pregnant. plus I have no friends I trust with tho secret literally no one knows. can you please give me advice