What is CRP?

From the web:
Normally there is no CRP in blood serum. From Lab Tests Online, "a high or increasing amount of CRP in your blood suggests that you have an acute infection or inflammation. Although a result above 1 mg/dL is usually considered high for CRP, most infections and inflammations result in CRP levels above 10 mg/dL".
A positive CRP may be an indicator of several conditions, including:
rheumatoid arthritis
rheumatic fever
cancer
tuberculosis
pneumonia
heart attack
lupus

Well, I wish I could say all that made me feel better. :-( Normal is 0 to 0.5 and Tessa's is 18.9.