rum cake?

So I'm about 5 weeks right now. My mom side of the family is Jamaican. She just got a rum cake from a friend. With all my cravings I had a tiny cut of some...is that bad?! I feel so horrible. Every since I found out I was pregnant I wasn't craving alchol(I don't drink like that, once in a while). And plus it was cake...before I found out I was pregnant I did smoke and drink...not too much. But I didn't even know I was pregnant. I don't plan on having another bite of the rum cake. My mom told me to bring some home but I told her no, cause she doesn't know yet. I feel like such a horrible person right now. I want to cry 😔