I made two trips to china early in the year, 14 days after returning i have volatile diarrhea, thinking it was a parasite, I took a z pack and a round of sipro ,,,, it got better after 14 days or so of terrible cramping and non stop diarrhea, now i still have cramping, discomfort and pain in the upper and lower areas of my stomach, Diarrhea comes and goes, headaches that come and go, very tired, lethargic, slight fever at times, blood work has come back normal, urnine and stool samples are negative, cat scan negative, psi count negative, Could I have eaten radiated food in china that is still making me sick? Can I test for it? what else could be causing these symptoms?