Bleeding after Sex

Hey all. I am 15 weeks and 1 day today. I had been taking progesterone and stopped a week ago. I have had no issues with my pregnancy up until this point but last night after having sex there was some bleeding. Not much today but of course I worry about everything since I’m 36 and this is my fourth child. It has been 12 years since my last child so I feel as if I’m starting over. I’m just trying to see if anyone may have experienced bleeding after sex around this time in their pregnancy. I see the doctor on December 3, but figured I’d ask here to get a bit of peace of mind. Thanks all.