Alcohol in tww?

I'm currently 4dpo, having a few dull cramping sensations in lower abdomen and weird waves of nausea but think its too soon for symptoms. My question is I'm going away on Friday so I will be 7dpo then, and no doubt everyone will be having a few drinks, should I not worry and drink as well? I don't want to miss out on having a good time with my family and it is a special occasion but then I don't want to ruin my chance of a bfp! Anyone else in the same situation? I don't want to see a bfn then know I missed out on celebrating with my family. Should I maybe test on Friday just incase something shows up? I know it's probably way too early..