cannot bend thumb; other thumb difficult to bend

I have no health insurance. I've had arthritis for years in fingers and knees but it's been manageable. Within last month have much more pain in both thumbs and at base of thumbs on the palm. Now cannot bend right thumb at all; left thumb is starting this but I can still bend it. I can hear slight popping noise when I bend movable thumb. Both thumbs painful. Getting tough to grip things with my right hand. Wondering if anyone with similar symptoms can suggest any home remedies to relieve symptoms or any good supplements or diet changes? Figure I should try and do something while I look into seeking medical attention w/out insurance.