Do I have grounds for medical malpractice/neglect?

I started having symptoms so went to E.R. They sent me home saying Tension Headache. They didnt stop, So I went back to E.R. Again contributed it to stress.By this time I was having more and different symptoms. I had another Headache so third time I went back and everything was fine I got to room with Nurse. she was taking my blood and then she gave me something for pain, She did that without telling me. The next thing I knew The Nurse was standing there telling me she had 3 more shots for me. The next thing i knew I was standing there Nurse was dressing me, Doctor was pointing finger in my face calling me a Liar, a Meth Head, [there was no results on copy lab work to indicate positive for any drugs.] And told me to get out I was so out of it the Nurse walked me to waiting room, My phone was dead, i was pose to call my ride and in front of everyone said lay off the meth. the next thing I was standing in hospital parking lot waiting for my ride. That was 2/10 I have a letter from the President of the Hospital wrote me a letter dated 2/11 asking how my visit went. thats the jest of it there is more.