I know it's possible, but has it happen to you? My current bf and I haven't been dating long but we are sexually activ together. We always use condoms to be safe he does not want to be a dad at all and is already concerned about dating me because I have a child. He and I are both young and he wants to live his life and he isn ready to be a dad yet and it scares him.. I wasn't concerned until I really thought about it today. Condoms do fail.. I'm 7 days late for my period. My boobs not just my nipples I mean my whole breast is sore and last night I got exteremly sick after smelling his cum.. Weird I know never happened but I had weird things like that with y first.. I know I just need to wait then take a home test then see an obgyn.. But I'm really curious is to have condoms ever fail for you and what happened?