Am I at risk of being pregnant?

I highly doubt I am, but when my boyfriend was visiting we would sometimes fool around, i would jerk him off until he came, he mostly only came on my chest, face, or on himself, and i always put a towel over my lap and blocking into my pants. i never once felt anything enter me, were both virgins. He made sure cum didnt drip near my nether regions by running his finger across my lower stomach once we washed our hands. I need to start my period soon, i spotted a little yesterday and have just been having discharge like when i usually start my period, i am also experiencing light cramps, which also happens when im close to my period. But im also dizzy, but thats nothing new to me, if thats related or not.  Am i just paranoid?