Possible miscarriage?

M

Hi all. I found out I was pregnant on Thursday (about 4 weeks) and started spotting on Friday. By Saturday I was bleeding light to medium, no clots or anything. We were super concerned so we ended up in the ER. I had blood drawn and a pelvic exam. The doctor said my uterus was closed which he said it was not having an active miscarriage. My blood test indicated super low hcg levels, 13. My level made the Doctor change his opinion and that I may be having a miscarriage. I had an ultrasound and it didn’t show anything since it’s so early. I’m scheduled to go the my obgyn later this week to retest. I really don’t know what to think. Has anyone else gone through a similar experience?