Pls help....

Hello. I did an IVF transfer June 26th, was told it was a beautiful transfer of 2 embryos. This past Tuesday, July 7th, I got a Bfp, however doc told me to be cautiously optimistic as it could be a chemical pregnancy because my level was 48.76.

This morning, July 11th, I woke up to heavier spotting Mostly brown blood with a little red now, but mostly when I wipe after going to the bathroom .passing of one of the embryos, or just normal pregnancy symptoms.I think they are miscarry symptoms. I am normally a pretty together person but this has turned me upside down as I feel like I'm on an emotional roller coaster. This bleeding after my embryo transfer worries me.