Sudden Onset of Symptoms: Need Help!

Hi there, my name is Travis... November 1st 2021 is when all of these symptoms all occured almost all within one month. I had taken myself to the ER because I thought i had a heart attack. Everyday I constantly feeling like I'm dying due to the anxiety and or something going om with my brain: Brain fog, light sensitivity, trouble understanding people, severe anxiety, heart palpitations are back, and I feel like I'm high or drunk all the time, I feel as if im incoherent and ive been severely lethargic, and my head and eyes have been hurting and I don't get very hungry. I don't know what's wrong with me... I am not me anymore and I need help from somebody who's possibly dealing with everything I'm dealing with.