Is heavy bleeding for a few hours normal?

I am 6 weeks pregnant. I had a pelvic exam done due to an infection and not long after that started bleeding heavy. The bleeding only lasted a few hours. And there were some cramps along with that. I went to the emergency room and they had said that they did not know if it was a miscarriage or not they said my hcg levels were still normal but said they couldn’t find anything on the ultrasound. Could it be too early to find on the ultrasound at 6 weeks? This is my second pregnancy and this didn’t happen with my first. Just wondering if this has happened to anyone else and if everything was fine.

I would make an appointment with your ob to get blood work to see if your hcg levels have gone up or down. When I was pregnant with my first baby, I bled heavily super early.i went to the ER but they told me since it was still so early (I wanna say I was only 3-4 weeks), they couldn’t see anything. So it is a possibility. The only way to know for sure is to go see your doctor.