Hmm, have you had your ANCA antibodies chekced? They cause vasculitis.
Reading the symptoms does sound a lot like you.https://medlineplus.gov/lab-tests/antineutrophil-cytoplasmic-antibodies-anca-test/
Muscle and/or joint aches
Blood in the urine
Foamy urine, which is caused by protein in the urine
In particular, the Microscopic polyangiitis (MPA) sounds a lot like you. Often has kidney problems and strange skin manifestations