Does a high c reactive protein level mess with your metabolosm? I eat between 800 & 1000 calories/day and exercise 4 days /week and gain weight.

May be other causes. Are you also suffering from fatigue, heat/cold intolerance, skin changes, etc. If yes to any of these, you may want to ask your doctor to check your thyroid function or look for other causes. The CRP measures inflammation and may be indicative, not the cause, of other issues.