Remicade and growing masses

Hello,

I am a 30 y/o f w/ JRA that went into remission then came back at age 20. I have been on Remicade for a year now with 1ml syringe of methotrexate q1w , 5mg prednisone, folic acid, ibuprofen 800mg x 4qd. In January I noticed a lump under my left armpit almost into the breast tissue that was rapidly growing in size and tender to the touch. Since first noticing this one I was ultrasounded, had a CT scan and since developed one on the other side. I have been told my several doctors they are nothing to be concerned about that they are possibly RA nodules or from the remicade. 2 months ago I developed another growth directly under my chin and into my throat that has only grown. I had this mass biopsied with no malignancy found so this new doctor is now off to find out why I have all of these growths forming. Next is a thyroid test... Has anyone else experienced these masses or growths with Remicade or methotrexate? I am so tired of everything being pushed off and told "it's your RA" or "it's the medications" I cannot find anywhere where this has happened to others.