The stress of TTC can sometimes be too much for one day and a glass of wine or a pint of hard cider is really, really tempting however I am and have always been with the opinion that there is no safe amount. When in doubt, don't do it.
My doctor had advised absolutely 100% no drinking when TTC, regardless of problems trying to conceive or not - there is no safe amount of alcohol. The first few weeks after conception are extremely vital and you don't want to impact those first few growing weeks negatively, even if it's just one glass. Others might disagree with my opinion but personally, I found it was the right thing for me.
You'll have to decide what is right and wrong for you - not what is right and wrong for others. I knew for myself, that if anything turned out badly (ex. heaven forbid my baby should have a birth defect) I might attribute it to that one glass of wine I had with dinner, and I don't want to have that guilt/shaming feeling. I will have a drink when I stop breastfeeding.
Maybe try chocolate instead? My friend (also TTC) is a big wino and she regularly pours herself a glass of wine, inhales the scent and then pours it down the drain - she can't bring herself to drink so she makes due with the smell of it!
Hope this helps! Best of luck to you!