What Should I Do About The Recurring Pain In The Middle Of My Rib Cage, Lasting 3-4 Days, While Using Ketamine?

Hi i am 19 years old and have been on ketamine since I was 16 I am suffering with pain just in the middle of my rib cage I cannot cope with the pain I was cramped down hovering over the toilet being sick all day I get these pains now and then and they last 3 to 4 days what do I do because I need some help please?