Is there something wrong with the area where I received the implant or is it just healing?

Q. I recently had two implants put in at the same time my surgeon removed a decayed tooth and done some bone grafting. Both of these implants failed, but I am still really sore around this area. I had the implants put in 6 weeks ago, then one taken out two weeks ago, then the other 10 days ago. Yesterday a small piece of bone came out of the site area and bled a tiny bit, this morning the site felt ok, but later in the day it is very sore again. Do you think that everything is still healing or do you think there is a problem. The soresness comes and goes and does not keep me awake at night. Thank you,