Hi i just had sex with my girlfriend and i came and the condom slightly slipped and i believe some semen may have escaped but i don't know if it went inside her. i did notice it around slightly but i don't think it went inside. do you think we will be oka

Probably, however...: It sounds like if any escaped it was not much but there is a small possibility that a small amount is in her vagina. You should be more concerned if she is mid-cycle (if it has been 9-16 days or so since her last period started). She could try to wash out any sperm. If mid-cycle and you think there is a reasonable chance some sperm entered she could try Plan B (the morning after pill) to be safe.