Congratulations, I completely understand your worry I was in the same boat. And it's alright, it's early days. When the eggs a bycost etc, alcohol doesn't seem to effect it the same way, as it does once the placenta takes over.
We had actually given up after years of trying it all diets etc, and IVF that couldn't happen (my eggs were duds). I was back on contraception to help with my PCOS systems. I hadn't had a period in six months so nothing was unusual there. The millions of hopful tests I took all negative. About a month after, we were going out to a sports event and I planned to drink a lot and let loose, I had been forever sober at this point. I still took one last test that morning and it was negative.
Then a week or so later, I felt odd with symptoms. I took a test and first positive ever. Was the happiest, scariest moment. I just got a magic baby, after all drs said it would be impossible, but did I ruin everything, I was so worried. But now my baby boy is almost four month old, and he is perfect.
Needless to say, I stayed sober the rest of the pregnancy after that. As even though it's a controversial subject of people feeling a glass and moderation is fine. Other studies showed negative effects from any alcohol. And that I couldn't risk.
But relax and enjoy the moment.