My boyfriend and I haven't had sex and I'm still a virgin but we have gave each other hand jobs and after he ejaculated he washed his hands three times before he continued on me. My period isn't late but I've gained some weight very quickly its been three weeks and my period should be in the next week and a half I'm worried that I might be pregnant

If you have done what you said, I see no way you could be pregnant. ( if he really washed his hands)

But you are getting close and one mistake can make you pregnant, so I hope this time being scared teaches you a lesson about sex until you are ready for a baby.

But you will be 100 percent sure when you get your next period. If you do not have it, take a home test about a week after it was due.