Well it sounds like there is a good chance you are UTD! I think it is possible to get false positives from what I've heard, but they seem pretty rare. Do you have any more tests on hand? Maybe try another one and see if you get the same result. Otherwise book a trip to your GP and get a blood test done to find out for sure.

Don't stress out about the alcohol, a bub at this stage doesn't share your bloodstream. And you can have a couple of cups of coffee a day while pregnant so don't stress!

Best of luck