WORRIED!!

help!! we had sex 3 times this month but the first time was only like 5 strokes... unprotected, he was nowhere near cumming.. the other 2 were protected! (thankfully) i have 5 days until my period, but i'm having all of the period symptoms, but literally they're the same thing as pregnancy symptoms. do you guys think i have anything to worry about?! i worry about a lot and i don't want this to throw off my period for this month! help asap!!