Hi JTsmommy,
Welcome to this wonderful forum! I use a sauna but not the blanket type (I saw those on Amazon). I use the portable because I could not afford the cedar wood or those expensive ones and I love mine!!
I suggest you start off slow (like you said, 5 minutes and build up). Are you taking detox baths? If so, how do you react to those?
There are also detox foot baths (instructions for all methods of detoxing are in the "New to Lyme? Start Here!" Sticky Thread on top of this forum, you scroll down a bit).
Happy detoxing!
Denise