Sore gums four months after bone graft

I am a 25 year old female doctor, non-smoker; In 2005 I underwent a root canal on the right central maxillary tooth . All was well until 5 years later I felt discomfort over the tooth again and another root canal was attempted. This process could not bee finished because I kept feeling pain and 6 months in of starting the root canal I got a small abscess over the tooth. I proceeded to an Apicoectomy. This went well but 6 months later I felt pain again. There were no signs of infection over the gum and CT showed no abscess, apart from a slightly dark shadow over buccal plate of the bone. Another procedure was done, where exploration of the apicoectomy was done, which showed there was mild bone resorption where the dark shadow stood but no signs of infection. I was still in pain but oral surgeon said it might be 'scar tissue'. I visited another oral surgeon a few months later who realised there was redness over the gum. We proceeded to a Dental Implant; July 2014 - extraction and 'gel foam'(?) to keep root shape.

I felt better but was still feeling uncomfortable up until February 2014. I underwent a bone graft (bovine) with PRP and titanium implant inserted. I was completely pain free for a full 5 months up until the crown was loaded onto abutment. 8 days after the placement of the crown (when I was still pain free) I started feelin discomfort over the root again and noted that my lower tooth was hitting the implant(this was fixed). Another CT done which showed bone resorption. Gum flap raised in another procedure and oral surgeon noticed that part of the screw was in contact with gum due to bone resorption(!). Another bone graft placed with PRP ( crown was never removed) but 4 months down the line I am still very sore over the gums. Xrays show no abscess, there is no redness over the gums or signs of infection and it is described as a dull ache; oral surgeon noted bone remodelling still occuring over the titanium implant. I am at my wit's end, and I shall be moving to the states in 3 months time so this has come at a very bad time. I am constantly focused on the tooth and I cannot concentrate on anything else. Any suggestions on how one would proceed would be greatly appreciated.