go see a physical therapist and/or a good orthopedic doctor who should rule out tendon damage. "tennis elbow" is very common, and I got it last summer after pulling weeds for a couple of days... same symptoms you describe. But a good PT can give you specific exercises based on where the injury is. Motrin helps in the short term for the local pain, the exercises (and otherwise REST) and the arm strap help in the long term, not necessarily in that order
don't go for surgery automatically, get a second opinion.