Your smells come during your period, sounds like a hormonal disorder. However I imagine you've already gone to many doctors and they may have found nothing wrong. It can be frustrating. Tell me what is your odor like? Is it all over, your armpits, your scalp, or your vag?
I have not tested for TMAU...kind of scared to and at the same time don't know how reliable the test can be. I am trying to eat healthy, do not eat the foods I am sensitive to, drink water, and am trying to avoid sugars. Still taking supplements because I always think that maybe just maybe some switch will turn on inside and make my sweating and odor normal again.
Good luck at your appointment. I honestly hope the doc can figure this out for you and that its a simple solution so you can carry on with your life. I too need to figure this out and have proposed that this year I will exhaust all medical professionals (even if they all say its nothing) and will find out what this is. I am here if you ever need to talk :-)