Started bleeding at a wedding today

I’m 10 weeks and a day. I felt kinda off all day and kinda uncomfortable but didn’t think a lot about it. This afternoon at my husband’s friends wedding, I went to the bathroom and saw bright red blood. A lot. I was so scared, we left and went to the ER immediately. Turns out that baby is 100% fine, measuring exactly on time, bouncing everywhere and acting like a wiggle worm. They found a tiny subchorionic hematoma. Around 1 cm in length. That’s the best they could determine as to what was causing the bleeding. Has anyone else had this?? I’m happy my baby is ok but still concerned that the bleeding could turn into more :/