My Rhuematologist Put Me On Arava For RA. However No

My Rhuematologist put me on Arava for RA. However no blood tests have shown up with evidence I have it. She's going by X-rays and symptoms I have. Also I was sick with upper respiratory infections every two weeks even though I stopped taking it while sick, but still sick every two weeks. My mother and sister both have it. I took myself off of it because I couldn't tell a difference. However when there's a weather change I hurt so bad I'm in tears. Should I get back on Arava?