Night out

So I feel like I’m really going crazy. I think I deserve to have a night out and enjoy some drinks. I had to stop working when I was about to 3 months pregnant and my baby just turned a month. I haven’t left the house in months or seen many friends since I had to stop working.. I had a rough pregnancy (had a stroke and was in/out of the hospital) I’ve been home with my baby I’m not complaining I love him so much! I am also breastfeeding but I want to slowly introduce him to formula.. is it ok to put him on formula for a day or so just to be safe in case I were to have alcohol in my system?