Hi. For The Past Few Months I Have Experienced A

Hi. For the past few months I have experienced a strong pain in my left buttock, leading to my lower back and upper thigh. It eventually goes away but sometimes I wake up with it back and the pain is very intense. I have a bit of a drinking problem and it seems to come back when I've been drinking more than usual, so I don't know if this has something to do with it. Thanks in advance