How much is too much?

Shelby • Former athletic trainer;current stay at home mama to 2 (4 YO & 22 month old);pitbull/cat mama;happily married;lover of Jesus Christ
We just found out yesterday that we are pregnant with our first baby!!! So excited!!
I do have one concern. The last few weeks (not sure, but Glow says I might be 5 weeks) I have drank casually. And when I say that, I mean I've drank maybe 3 days out of those few weeks. Is it bad if I had a couple of glasses of wine in one sitting?
--Curious newby