help-bleeding 2 wks before period is due

So my period is due in 2 weeks and yesterday I had light brown discharge for a couple of hours and then today I started bleeding out of the blue for a couple of hours as well, with cramps 😟 husband and I have had unprotected sex over the past 2 weeks since my last period (he pulls out) and I have never had this happen before. Doctor appointment on Monday but wanted to see if anyone had experienced this before or had any suggestions of what it could be.. Thanks in advance 😘