You can have PMR with normal CRP and SED rate tests.

"Polymyalgia rheumatica can still be a very surprising disease: the diagnosis is possible even if normal values of both ESR and CRP are present."
--- Polymyalgia rheumatica with normal values of both erythrocyte sedimentation rate and C-reactive protein concentration at the time of diagnosis: a four-point guidance: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5911650/