Knee pain refuse to go away

Hello,about a year ago I started experience some knee pain.It started after I used squat shoes a couple of times,the pain is not too great,is in the center of the right knee My knee also click when I squeeze the quads ,back then I didnt realy train and I was very weak (I did some front squat with less than a plate).Later I got rid of the shoe and stated to do the SS LP,it went well ,I dont (and didnt )have pain while I squat so the pain didnt interfered with the progresion (but I didnt do cleans) I got x ray and ultrasound and I had (when I did it) "a litle bit of an extra fluid in the Suprapatellar Bursa". In the program I put on a bunch of weight (20-25 kg) and the pain is the same.Now the pain is the same as it was a year ago.Any advise please? (21 years old)