Rheumatoid arthritis without inflammation
According to various sources like this one you can have rheumatoid arthritis without any indication of inflammation.
Yes, it's possible to have RA and normal inflammatory markers. It's also possible to have RA without swelling.
corroborated by this source
To answer your question yes it is possible to have that kind of pain with out inflammation.I will aslo say this that many people test negative for for ra and other types of arthritis as well,but does not mean that you do not have it.