Bleeding

So, quick question! I had a very very faint line this morning on a test, which would make me 3 weeks and 5 days pregnant. I had a hot shower to clean up and relax myself (not sure if that’s relevant) but about an hour later I started bleeding, it was about a moderate flow, not too light but not too heavy either.

Has anyone ever bled in early pregnancy fairly decently and had a healthy pregnancy?

I’m really worried