I've been on plaquenil for about a week now, and in the last few days I started having some abdominal cramping- which is now quite severe. Does it get better?

My symptoms that led the lupus diagnosis have calmed down appart from some chest pain and skin sensitivity (they started going before my rheumy appointment). I am only on two per day and I read that the dosage is 2-4/day. Does that mean it won't do anything at the lower dosages? Can I go down since I am not getting bad symptoms. Seriously at the moment- the treatment is worse