Alcohol while pregnant?

Kenny
I don't want any hate for this but I'm just wondering if I was to find out I was pregnant (I wouldn't be far on anyway) would drinking alcohol be a bad thing? 
Ive just come back from a 2 day drinking session and Just figured if I was pregnant would it screw it up? 
If j was pregnant before I had the 2 day drinking session would it harm it

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