Advice

So I’ve recently learned I’m pregnant. Well about 4 weeks pregnant and I’ve narrowed down when I got pregnant because they only possible time was the time I have narrowed it down to bc that’s the only sex I’ve had in over 3 months. And within a week of that time I drank. Actually it was about a week after the sex. I got drunk unknowing i was pregnant. Will that effect my baby since it was super early?