Me and my boyfriend were messing around and his penistouched my vagina. he did not cum but my period is almostlate. should i worry about pregnancy?

You should be ok: If there was not penetration you should not be pregnant. Please take precautions in the future. Use protection if you will be sexually active.

Already late: If you are alrerady late or just before menstral cycle, you should be past the fertile period.

Unlikely: The sperm has to travel to the cervix, which is inside the vagina up the uterus to the fallopian tubes to reach an egg. If anything flowed inside and you are not sure, always easy to do hpt and find out.