What cleanse to do?

I have been traveling in South East Asia for about a year. I got recurring e.coli three times, then Typhoid Fever (a form of selmonilla I think) and the Giardia, or something similar. I dont know exact details about the first two as foreign doctors treated me and might have used these names as they would be most familiar to me. As for Giardia, as opposed to being tested then treated, the doctor gave me a treatment that was very specific and would not hurt any other part of my system...and since it stopped the diarhhea, he said this shows it was a Giardia type bug.

But then 6 months later, after the Typhoid, 1/3 of my hair fell out, I had trouble thinking, speaking, (finding my words) no short term memory, fatigue, irritability and still had bloating after every meal, sometimes with abdominal pain and gas.

In spite of all these problems in teh last year, I somehow put on weight and it is still there. Granted I was eating fried foods everyday as this is their diet in SE Asia, but could the weight from fried foods have stayed on despite all the diarhhea and illness?

So my queation finally, is this: What do i do now, to ensure that my body is completely clean and can begin to find normalcy? What steps do I take and what measures? And does anyone know why I still have this extra weight?

DayStar