1 glass of wine, feel insanely guilty

For two weeks now I've been having false labor. I'm so uncomfortable and so sick of having contractions that lead to nothing productive. I'm 39+2 pregnant. So tonight after DH and I took a walk, I came home and poured myself a small glass of red wine. I thought it would help me relax and maybe get a good night sleep, since I haven't properly slept in weeks. And that small glass on wine, oh man it was so good! It's the only alcohol I've had my entire pregnancy and it tasted so good. I felt so relaxed and happy.