I am about 1 week late for my period. I came off birth control about 7 months ago and have been averaging 12-13 days post peak to start my period and I am now on day 21. I had my annual physical last week and had elevated liver enzymes (bilirubin, ALT, and AST). I have also been having stomach pain and headaches. I have taken 2 home pregnancy tests this week and both came back negative. Could my elevated liver enzymes be causing my late period?