Thinking about drinking?

I miscarried on the 30th of June, I haven’t had a period yet, but I feel like how I was when I was pregnant, my hcg levels are already at 0 on July the 3rd. My birthday is Monday and I want to drink but I’m worried that I may be pregnant. Advice? I’m worried I may be to early to show on a test and don’t want to hurt the baby if I am.