Try to relax. If you are worried about getting pregnant and yet choose to engage in sexual play with your boyfriend, I strongly suggest that you start using birth control consistently.
Was there semen on your fingers? Did you insert your fingers into your vagina?
The vagina is an elastic, muscular canal that connects the uterus to the outside of your body. The vulva and labia form the entrance. The vagina receives the penis during sexual intercourse.
If you had semen on your fingers and touched your vulva or labia, or inserted your finger into your vagina, there is a good chance that sperm entered your body.
If, at this time, one of your ovaries recently released an egg (ovulation), there is a good chance that you could be pregnant (conception).
Please take a few minutes to look over the sexual health resource page on this website.