Bleeding while pregnant

I had entercouse on wed and Thursday I had very little light pink spotting and lots of cramping and a little today but very little I called the doctor and they said it’s from having sex but idk I feel really concerned I’ve had a miscarriage before and I’m really scared I’m 12 weeks and 2 days today and my doctors office is closed on the weekends has anyone else experienced this I’m really freaking out they said there is no need for me to come in to see them so Idk