Anybody know?

So I had a miscarriage on the 25th of August. I stopped bleeding two days ago.. My and my fiancé wanted to have sex and I said sure. My doctor told us to wait to try again but we didn't listen... I didn't think I would ovulate so fast after but he did a pelvic exam today and by what he saw he thinks I could be ovulating or already did. He says that this could be bad because he said a perfectly good egg might not burrow into the wall correctly and it very well might terminate this next pregnancy as well... What do you guys think? Has anyone ever had it work out for them??