It is possible is due to uric acid. Eating lots of protein "could" increase your uric acid levels. Gout is mostly associated with the feet/big toe. But it is possible in other joints.

Of course, it could just be that you have a bad hip and your relative increase in movement is irritating it.

I have lots of bad joints (since age 12). Even when I show no RA activity I get sore joints. Sometimes one, sometimes several, fortunately mostly none. And really no major changes in activity. Environmental changes do bother them eg pollen, pressure changes, etc.

In addition, the joint surface is not always the issue. The bursa is often the bigger problem especially shoulders.

And of course you cannot rule out some other injury. After hurting my ankle, my walking to compensate for the sore ankle lead to hip issues.