I put my arm on my pillow at night and no not sleep on it or let it hand off the bed.. I use hot.cold presses a few times a week, and I take a script anti inflammatory.. use wrist wraps for the tendinitis, and for the tennis elbow, try just 305 days or predisone.. its rough and you'll wanna bail, but it helped with my recently and I have it BAD ..
also, lay of compound movements for now, like over head presses ma nd use my DB and ez-bar curls, the slight adjustment with your wrist will assist with the tendons .. stay away from BB curls and any straight bars.. use more cables and machines, and alive works wonders