11 weeks pregnant and had a little bit of bleeding

Maybe not enough to fill a pad but there was quite abit and still have a little today which is a day later.

Went to the emergency room and had an ultrasound done and everything looked fine!baby was wiggling and heartbeat was going.

But they couldn’t really give me a reason why this happened and I’m really scared it can happen again..has anyone gone through this and everything was okay??

It’s my first pregnancy that made it this far and I’m worrying myself a lot🙈