I am almost 15 and was prescribed Reglan?

Well, I have been throwing up all summer and I was started on 5mg tablets of Reglan four times a day, I was started on it on this past Tuesday. So only a few days now I have been taking it.. After just one pill and not much time after taking it, I started to experience symptoms, which are now very bad. I am drowsy, very tired, nauseated still, can't get to sleep or stay asleep, very bad headaches, heart is beating a bit off, I am also having vision problems, involuntary movements and my muscles all feel tense. Especially in my neck and face. I thought I was going to have a seizure last night. The last time I took it was a little over nine hours ago. What are your thoughts and what should I do?