Had R) Ingual Hernia Repair 6/10/15. 3/52 Off For Recovery.

Had R) ingual hernia repair 6/10/15. 3/52 off for recovery. Pain was getting better but then stayed and increased; sharp, gripping, stabbing. Remains and getting worse. Ultrasound inconclusive. Had CT: no results yet. Have had to miss work several times due to pain++. Have experienced some febrile occasions as well.
Surgeon stated re 6/10/16 event, that scar tissue present; was a little difficult, and had used a larger mesh than usual (keyhole procedure). Have impending Gastro-bypass surgery for weight loss (140kg and 5ft'10") booked on 27/03/17. I am VERY concerned at how debilitating it has become. Can barley walk some days.Can you advise please?
Hx: 1980 traditional repair R) femoral hernia; 2000 C/Section (High temps followed but resolved with IV AB's); 16/09/2015 R/O Gall Bladder and found umbilical hernia, also repaired. Three week recovery good.