Bleeding 7 weeks & 5 days

Hi ladies. I’m so nervous. On Friday morning me and my husband had sex. As soon as I went to the toilet I had pink blood. The day went on and the blood got heavier so I went to the ER they saw the baby and the heart beat at 130. Yesterday I bled more (read &brown;). Then today I’m bleeding brown. I have a feeling it has nothing to do with the sex and I feel I’m having a miscarriage again. Has anyone been through this? I heard that if it was caused by sex it should of went away that day.