Advice please

Been having positive tests since 4 days past missed period. Started bleeding 5 days past period Was a little heavy the first day or 2 (mostly dark brown very little dark red) and now has lightened up. I took 2 more test to see if they are getting lighter possibly a chemical but test are darker now. I’ve already been to the doctor did a scan but they couldn’t see anything as it might be to early. Also waiting on blood work results to come back. Just thought I would ask if anyone has experienced this and went on to have a healthy pregnancy.