I wouldnt get overly hung up over how many grams of caffine you consume. Suppose you could but the worry probably does you more harm than the can of coke, diet coke, tea whatever it is youv drank.
OH and I went through 2L of coke a day when I was pregnant with Jackson, he was fine. I dont drink tea or coffee so thought bloody sod it if I want a can of coke to see me through. Jackson was born healthy, happy and never had any adverse reactions if anything he hates coke (we tried him on it once for sugars when he was in hospital)
Not that you can always look at it this way, but there are people who put a whole lot worse in their systems and baby is fine so. Not a huge worry. Christ, a few year ago it was ok to have wine during pregnancy and theyv changed it again so, I dont think they can be sure of their own research at times
I dont drink full fat coke any more, for the health of my teeth as I wasnt pregnant yet. But Ive just stayed off it tbh because I dont get anything from the full fat stuff taste wise anymore.
However, if one day I want a can of coke or whatever Ill have it. Ive craved Irn Bru which was strange for me as I hated it before. Its calmed down again Ive not had a can in a couple weeks. But zero and diet I drink quite the thing.
xxxx