4 days late no BFP

Marge
I thought I had gotten somewhat regular in my cycle since having my first baby in March 2016. But according to my <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a>, I should be on my last day of my period, but it hasn't started yet. My husband and I had unprotected sex on the day after the last day of my period last month. I'm going to take another test today, but I'm a little worried. I've had a few beers in the last couple weeks. I know it's probably fine, (never more than 2 in a day, and I never got drunk) but my husband is super paranoid about stuff like that. It is what it is I guess.