Feeling hopeless

Hello everyone im new here.

I am writing this post at 4:30 am. Cant sleep. I have been getting headaches everyday for the past month and a half. Been feeling dizzy, hot flashes, sweaty hands when i go out, feel like im gonna fall over, my vision has gotten more blurrier than what it used to be. Sometimes i wake up in the middle of the night sweating and nauseas. Everything i read on the net says anurysm. Im scared. I do have a problem with my thyroid, its hypo but im having hyperthyroidism symptoms too, for some reason. Im going to the E.R in the morning for a CT scan. I just hate feeling like this. I feel like something very bad is going on with me. Sometimes im scared to go to sleep. Just now i woke up dizzy, with nausea and stomach pain, tightness in head and a little pain on left side of skull that lasted a min or two. What could be wrong with me??? Im always scared something bad will happen to me.