I had A horrible expirience at the hospital and i want to know if i can sue

I wen to the hospital September 2nd where I was told I had a cyst in my pancreous it made sense to me as my mother passed away from cancer, I went to the hospital and under went a ct scan where they injected you with medication and use ratiation to view your body when I was done i spoke to my doctor and she told me I was never suppose get the scan because they gave me the wrong documents they told me those papers belonged to a female named Katie i asked hpw is that possible if my name is all over the page well she said the doctor messed up since the happened Monday October 13 2014 I have made an appointment with a psychiatrist i have been severely depressed over the death of my mother two years ago Is there Anything I can do?