Hey Cupcakes. Here's my motto in life: Don't worry about stuff you can't change.
You can't undrink drinks you already had, so forget about it. And, while there are a million thing we can do to be perfect, it's not like a few drinks is going to harm anything -- certainly not even before conception.
If you are TTC, it's probably best to just relax. Stress doesn't help either.
If it makes you feel better, every month that I got that BFP, I had a mini two-week celebration of wine with dinner and my regular exercise, which was banned during treatments! Now I'm about 2 months along.
Good luck!