Yesterday around 3 pm I woke up from a nap. I stood up and immediately collapsed on the ground and started rolling around on the floor and convulsed for about 30 seconds. I was fully conscious and I have a vague memory of what happened. I was really freaked out and I slowly stood up. Within 2 seconds i collapsed again and my face slammed against the corner of my desk and i fell face first on the carpet. At this point i was crying and really scared. I crawled to a mirror and i stood up and saw a huge gash next to my lip and blood all over my face. I started to lose my vision and everything turned white. My hearing went and my head was throbbing. I felt like I was dying. I collapsed yet again cradling my head against the ground. I managed to crawl to a chair and sit. I called my mom and asked her to take me to the hospital, but there was a storm and she couldn't. After realizing that I lived on the third floor and I couldn't stand that I wouldn't be able to get down stairs I called 911. I had a hard time telling the operator what happened and where I lived. I couldn't remember very well. An ambulance took me to the hospital and they said my blood pressure was really low. Like 70/50. They gave me fluids. I got a head ct, chest xray, and an ekg. I tried to get up to go to the bathroom and managed to make it there. When I finished and stood up I started getting dizzy again and my senses started going and I called for help and they had to bring me a wheelchair. At this point I had a severe migraine as well. I also got 4 stitches for my face. Half the people I talked to while there said they thought I had a seizure and half the people said they didn't think I did. The doctor said all my tests were normal and there was nothing wrong. My blood pressure went back to normal and I got discharged with no real advice or medication and I still can barely make it across a room in my apartment without collapsing and loosing my vision and hearing which is accompanied by super bright, white tinted vision and severe tinnitus.I just crawl now. I cant even sit up straight. I have to recline. I'm making an appointment with a neurologist, but I don't know what to do until then. Does anyone have any idea what this could be?