Better safe than sorry?

Background: somewhat regular period but have off months, only been tracking my period/ovulation on here for a month (never really done it before), married with a 2 year old 😊

We are having a large family bbq tomorrow that will have drinks of all sorts. Im not a big drinker but like to enjoy a few with good company...problem is i'm late. Last period was july 5-9th. Took a test monday and it was negative. Is it safe to have a few drinks tomorrow? Or should i not just in case? Don't want people asking if I'm prego haha. Any input would be nice.