Pain behind the right rib

Hi, i've been having peptic ulcers since i was 17, now i'm 24. About six month ago i started noticing very weird pain under  my right rib, i get this pain only when i drink alcohol. The pain is really annoying and pinching, if i can describe it like pinching, not strong , i would consider it as discomfort. As i said before  i get it only the next day after i drink, the pain is totally gone by the night . I started thinking that probably i have liver problems , but i did ultrasound and blood test and they told me that my liver is fine, only i've got another ulcer in my esophagus, so they gave me the whole bunch of antibiotics to kill the bacteria which causes the ulcers i have.  But i still have this weird pain. Would u please help me out with my question. Thank you very much