Hi, i came back from Kenya 3 weeks ago with diarrehoa about 5 times a day and felt exhausted, had headaches, body aches and stomach cramps. i wentt to my gp and they gave me antibiotics and diaralyte. whilst on my antibiotics the diarraheo stopped and i felt better towards the end of the course. after finishing the antibiotics, the diarrehoa came back and i have had it for 3 days now, it is like a really dark (if not black) liquid. im not sure what to do now? please help