I completely undertsand where you're coming from. I have been suicidal as well from this disorder. The psychological affects of this disease is so much worse than the disease itself!!
I didn't know that Sugar was bad for TMAU. I DO know that eating chocolate makes the smell much worse...and most cookies and baked goods have eggs in them so maybe thats what you mean? I've never had a problem with Sugar in my tea or even lifesavers type candies or anything like that.
For me I swear by probiotics. It's the ONLY thing that has lessoned the odor. I take them with every meal! I make sure to keep them in my bag whenever i leave the house.
TMAU is on my mind EVERY moment of the day. My mind never rests and can't ever stop thinking about it. That is the worst part. But you have to just stay strong and keep your head up. At least you know there are people out there who DO understand you. I know exactly how you feel! I pray we find a cure one day. Sending lots of love your way.