Drinking during pregnancy

I haven't drank my whole pregnancy. 21 weeks. Sept last night I had two glasses of wine. They were small glasses but I feel so guilty. It was my bachelorette party and thought it would be ok. But I just feel bad about it now. And I smoked a cig which I haven't done the whole time either. Inwont be doing this again durring my pregnancy because the guilt is to much. Opinions?