The below is the AI overview when I put what I think are the most important symptoms into a search:
‘The combination of joint swelling, very high CRP, and hypochromic red blood cells strongly suggests a severe inflammatory condition, such as rheumatoid arthritis (RA) or an infectious arthritis, possibly complicated by iron deficiency anemia. High CRP indicates significant inflammation, joint swelling is a classic symptom of inflammatory arthritis, and hypochromic (pale) red blood cells are a sign of low hemoglobin, which is often due to chronic inflammation causing anemia of chronic disease or iron deficiency.
Likely causes
Rheumatoid arthritis (RA):
An autoimmune disease that causes chronic inflammation of the joints, leading to pain, swelling, and high CRP levels. The chronic inflammation can also lead to iron deficiency or anemia of chronic disease, resulting in hypochromic red blood cells.
Infectious arthritis:
This occurs when a joint becomes infected, often by bacteria. It can cause severe joint pain and swelling, a very high CRP level (especially with bacterial infection), and potentially lead to anemia.
Reactive arthritis:
Joint inflammation triggered by an infection elsewhere in the body (like the gut or urinary tract), which can cause joint pain and swelling and elevated CRP.
Other chronic inflammatory diseases:
Conditions like lupus or inflammatory bowel disease can also cause joint issues and inflammation, though RA is a more common cause of both severe joint issues and high CRP‘
I would discount infectious arthritis as it doesn’t sound like it comes from one joint.
I would probably show that to the GP and ask for advice.
But do respect their expertise, especially if you come across a genuinely interested and experienced one. Their 7 years + of training has value that exceeds my (and others’) amateur but logical sleuthing!