I had a V a day habit before getting pregnant this time and last time. Last time my OB told me that 1 can of V a day was fine!! I was more cautious than he suggested and cut back significantly (to once a week/fortnight). This time I have had two cans so far (i am 10 weeks). I feel guilty too.... Not about the caffeine, but about the other stuff in it. Its very hard to give up though, especially when you feel so crap. Try not to feel too bad - only 4 cans isnt likely to harm the baby.