Why after abutment was placed the gums are receding more? (photo)

I had a pre nolar and 2 molars extracted. Oral surgeon said 2 implants are necessary. After the implants were placed they healed for 2 months. I had the uncovering 4 days ago and 2 days after I stared to run a 102 fever and body and head aches and I could feel lile my abutment has a pulse in it. They feel like they are vibrateing. Tooth #5 always had gum recession before the implants but, after the uncovering it got worse.