I had a similar problem-- you should look up hydrocephalus. There can be a buildup of fluids in your brain after you took the shower. It happens for different reasons, but i've read that it can happen due to lesions. I had all of the symptoms of it from after taking a cold shower.

What I wish I did immediately after the shower, would be to take vitamin E (tocotrienols) to get the blood flowing, because cold showers rapidly constrict the blood vessels, and prevent and deal with strokes to a degree. I would then use serrepeptase to clear up the vessels, (do your research on it and what it does), and then take Benfotiamine with ALA, OR with Ubiquinol to fight the inflammation and swelling, alongside with diuretics (to remove water from body, mainly if there is a buildup of fluids in the brain). I drank green tea, and that took out a ton of extra liquids from my body, which helped with the swelling.

I did this with much prayer as well. I have had a tremendous recovery over the past month this has happened. Ask if you have any questions.