When i was 15 i used to get pains in my hands now and again with repetitive movements. now it's really bad ages 28. i was washing car today and hands were so painful and stiff feeling. i still feel pain in them hours later. what could this be?

Since you don't describe joint swelling or redness or history of morning joint aches or stiffness, I don't think you're dealing with rheumatoid arthritis. Rather,I think your current discomfort is from an overuse syndrome &expect symptoms to gradually resolve after resting your hands. If you still have concerns,consult your MD or a rheumatologist for evaluation. Appropriate testing can be ordered