Hi. I've been on Ativan for about 2 months for anxiety attacks. I take it on a as needed basis, sometimes more often than not. It works out of your system fairly quickly. If you're taking 1.5 a day you should be alright to have a drink or two, but not more than that... as you know alochol increases the side effects of medications, so you'll probably be out and sleep after your second drink anyway. Check with your doctor first.
As for anxiety after running out of and missing pills, I probably assume so. I don't take it everyday. My doctors have told me that it's is fairly addictive if taken for long term, and its very easy to become dependant on. Recently I went back to my doctor because my dose wasn't helping my attacks. He didn't want to up the dose anymore because of its addictive qualities. He ended up putting me on an anti-depressant for my anxiety. I suggest you go back and talk to you doctor about what to do next.