Alcohol sensitivity - pregnancy symptom?

So please don't ream me for posing this question but I've read a few forums online that have claims that one of the earliest signs of pregnancy can be an unusual intolerance for alcohol. Tonight, I had a glass of red wine and yes, I am TTC. After one glass, I feel very tipsy! This is highly abnormal for me, I can normally have a few glasses and be relaxed but never anything close to feeling this buzzed. Does anyone have any experience with this?? Please, I'm not looking for judgemental comments about having 1 glass of wine at 6dpo.... Would just like to hear about any sincere experience with this. 

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