I had unprotected sex with my girlfriend 5 days after the end of her period when ovulation occurs. although i didn't get close to finishing, im scared she's pregnant. should i be worried?

Pregnancy is known to have occurred from sex on any and all days of the cycle. Even if you did not "come" semen/sperm was leaking from your penis and could impregnate. If this happened less than 72 hours ago, she should take emergency contraceptive (Plan B). If she misses her period by 4-5 days she should do a home pregnancy test. Use contraceptive all the time, every time.

Pre-ejaculatory semen contains sperm, so pregnancy is possible. If the period is delayed, obtain a serum HCG test to be certain about pregnancy.