Am I miscarrying ?? !! :(

I’ve been testing positive for a few weeks now, my last test yesterday said 3+ and I’ve been having positive pregnancy symptoms. According to my app I am nearly 6 weeks. I had sex and then I had a light pink discharge. Then an hour later I had that patch of bright red blood. And bled a little onto my underwear. After that it went back to light light pink and now I’m not bleeding anymore at all?

What happened? Am I miscarrying? Or this this normal to bleed ?