Question...

I am 3 dpo and AF is supposed to start on 8/23. I'm struggling with whether or not it's ok to have a glass of wine with dinner or have a cup of coffee in the morning. I know that once I'm prego these indulgences will definitely come to an end, but I don't know if I'm pregnant or not... my husband thinks I'm being silly and doesn't see why I'm even concerned about this, but if I am pregnant I want to make sure this little baby has the best environment possible to grow and develop. Does anyone else worry about this or have any opinions to share?