Has anyone experienced nausea or headache symptoms after a hot bath?

Last Week, I took a hot bath for one hour straight, only hot water. I remember sweating a lot in the bath then by the time of the shower I barely sweat. When I got out I was nauseous,headachy,anxious and had dry sweat, flushed face. My skin was hot but It also felt like It was balancing between cold. After I dried off I got out of the bathroom drank water and measured my temperature was 99.6 F. Not sure If I had heat stroke or Heat exhaustion but I wore lighter clothing and used an ice pack. Then two days later I felt worse, mental fogginess more confused, headachy. I was in the hospital and they checked my urine I had abnormal urine protein and high blood sugar when I came in (I dont have diabetes). I was given some fluids. Ive been having a fully white tongue for this week. For the whole week Ive been feeling worse,last few days woke up in the middle of the night with fever and I feel weak, dizzy in general. Im worried about permanent damage to my brain. Was It a mistake not to go to the hospital earlier in my case. Should I ask my neurologist to do an MRI to see my brain damage. Im honestly worried If I have permanent brain damage I really hope not.