When I first began therapeutic baths...
the first several times I got out I was dizzy and weak. And the baths were not even hot! But I was fine after cooling down.
Here is a quote from a sauna website (yes I know, sauna and tub bathing are different, but they both involve heat, yes?): "Eating before sweat bathing puts a strain on the circulatory system. As before swimming, wait an hour or two after a large meal before entering a sweat bath. Also, it is best not to bathe on an empty stomach. Sweat bathing, like any exercise, uses energy and some people in a depleted condition may experience nausea or even fainting. Settle for lower temperatures and shorter bathing sessions. It is also sensible to avoid sweat bathing when you are physically exhausted or after a long illness. ... Everyone reacts differently to heat. Learn your limits by beginning with lower temperatures and raising them gradually. Let your body tell you when it wants out–don't force it to endure uncomfortable heat. The body adapts with repeated exposure to heat. Sweat will flow more readily and the cardiovascular system functions and cools more efficiently.
People not acclimated to heat may feel nauseous or faint. ... Nausea is induced by a lack of blood to the parasympathetic nervous system and is a sign of impending fainting. This can result from bathing on an empty stomach when your blood
Sugar is low. ... Leave the room if you feel nauseous, lie down and have someone bring you fruit juice. Its
Sugar will help dispel your discomfort.
Fainting may also occur if you stand up abruptly in the sweat room. Blood vessels are relaxed during bathing and when you stand suddenly, blood rushed down, depriving the head of blood. Move slowly in the sweat room."
I've included the url below.
Also, I don't know much about enema formulas, perhaps starting both bathing and enemas at the same time was too much for your body to handle at once?
http://www.cyberbohemia.com/Pages/saunaprecautions.htm