Chemical pregnancy

Not sure if this is where to ask but my doc hasn't been much help. I had a misscarriage back in Jan. We ended up getting pregnancy again in June but this one turned out to be only a chemical pregnancy... I have been bleeding now off and on since June 30th. Some days it's just a little when i wipe and other days its like a light period day but still a decent amount. From what I've read with a chemical pregnancy 3 weeks seems like.a long time to keep bleeding. Has anyone else experienced this? How long did it take after a chemical for you to be able to try again.