I Feel Like I’m Dying, HELP!

I woke up from a nap yesterday afternoon and almost immediately began throwing up stomach acid. It was AWFUL and I kept throwing up for about five minutes. I tried my hardest to make a bowl of cereal, even though I felt completely weak, because I assumed it may be because I haven’t been eating enough. After the first bite, more vomiting. I took some medicine and attempted to sleep it off, only to wake up at 2am and vomit again. It FEELS like I’m starving or something because I feel so weak, but I have been eating normally! My I forced myself to eat again around 4am, and finally held it down and went back to sleep. I just woke up and I still feel very weak in my stomach and shaky. What can I do??