Hi...im on 15mg of methatrexate and doctor just up my dose of pred to 30. Left knee swelled up. Both knees were severely swollen when i first saw rheumy, but the swellling went down withp pred. Been on meth for 3 weeks now, but no relief. All the blood test are coming back negative! frustrating. NO other joint prob. Could i be alergic to something? who should i see for this?