I drank and smoked knowing I was pregnant and I regret it so much

I went the the doctors yesterday and she told me I was a month pregnant. The next day I went to a concert and drank & smoke. I feel so shitty. I went to see my favorite band of all time and it was my first actual concert I've ever been to. I drank 2 twisted tea's and smoked 3 cigarettes. I regret it SO much. I can't live this down. I'm so scared that I hurt my baby. Idk what I was thinking. It was so immature and irresponsible of me. If anyone has anything hurtful or negative to say, please don't. I just dk what to do rn and I'm so scared. Please someone, help.