Contractions

Okay ladies, I know we’re not medical professionals just figured to post to see what your personal opinions are. Hubby and I had sex around 5pm, and since then I’ve had some strong contractions but irregularly. I know semen can soften the cervix and increase BH.. I’m being checked at my appointment tomorrow morning regardless, just curious to see if these contractions could actually be a serious start to labor? Can sex really push my right into full blown labor? I’m only 36 weeks, but I wouldn’t mind him coming now and lost my mucus plug at 35 weeks 1day.