I need advice

My cousin invited me out to dinner tonight. He just moved back and we've always been really close. The only thing is he likes to drink. So when we hang out we usually have a few. Would it be wrong for me to at least have one drink tonight....even though i'm trying to get pregnant? I mean... I don't know if I am yet or not... Its too early to know... I feel like an idiot asking this question. But I need some advice.