If i test neg for ra but have all the symptoms can i still have ra?

Yes: You could have seronegative rheumatoid authritis Have your physician refer you to a rheumatologist to clarify the diagnosis. About 20% of people with RA just do not have the positive rheumatoid factor

Doctors have no idea why, but a large number of people have symptoms with negative tests. That is because doctors have very little idea of what causes RA, or how to treat properly. So they call it "sero-negative RA".