Please help threatened miscarriage

Asiyah

I am 7weeks 5 days and have a sharp pain in my vaginal area and just one watery gush of light reddish blood came down. Immediately went to the ER. They did a pelvic exam and my cervix is closed they also did a TV ultrasound and I saw baby with a heartbeat they did tell me I'm having a threatened miscarriage, I'm so worried but I'm trying not to stress. Currently, I'm not having red blood but brown watery something onto a pad. Has anyone had this experience and continued pregnancy?