Over many years of driving I have been over the limit the next morning twice and both times it was only slightly above the limit(blew a 39 and a 40), on both occasions I felt completely sober after a night’s sleep and a breakfast and a coffee on my way to work, I had no idea I was still over the limit and was banned (rightly so) for 12 months both times(over 10 years apart), I stopped driving the next day if I had been drinking at all and since I have been disabled I don’t drink at all.
It is very hard to calculate how much you can have and impossible to work out for the next day so I would just err on the side of caution and don’t do it at all, I can’t begin to imagine if I would have hit someone thinking I was okay to find out it was because of drink, learn from other’s mistakes.