I am terrified for my ultrasound today

On Wednesday, I had bright red (almost looked like period blood) in the toilet after sex. The rest of the day I spotted but it was brown in color and mostly only when wiping, no clotting. Yesterday it was even lighter, brown, and only when wiping. It is continuing today, brown only when wiping.

I am 8w today and so terrified that we won’t see a heartbeat after seeing one at 6w5d. Has this type of spotting happened to anyone else? Were you ok?