I Have Been Having Episodes During The Night, Where I

I have been having episodes during the night, where I wake up feeling extremely hot and weak. I am sometimes disoriented and during these episodes I begin to sweat and overheat, feel dizzy and lightheaded and begin to feel as though I am about to faint. I have had these episodes about 4-5 times. Once, I vomited during an episode, once I fainted, and the last, most severe episode, I lost control of my bowels and began to shake. It is quite frightening. Each time this happens, I wake up feeling very hot. Each time this has happened, I have had a hot bath before I went to bed, and then woke up like this. Any advice would be much appreciated. Thank you kindly.