Spotting?

So last night I took an indoor cycling class (nothing new, I’ve been taking them 1-2x a week for the last year) and after class I used the restroom. When I wiped, there was blood. Bright red blood, but no clots. It had stopped within the 15 mins it took for me to get home. My husband and I were frantically googling and it sounds like exercise can trigger spotting. Has anyone else had this happen to them? I’m so worried, and our doc appt isn’t until Monday, which will be 8 weeks.