Hi, I'm 40 yrs of age, female, 170 lbs, 4'11. Aside from continous increase in weight, started taking medication to lower blood pressure three months ago. My problem started yesterday, had 6-7 watery brown diarrhea, slight fever and stomach cramps. Fevers gone after taking paracetamol but still have the same brown bm once this morning. What kind of tests should I take? thank you in advance.