I would send the card and no text or anything else, she might feel bad when she gets it..i would prefer to have my friend at my wedding and no bloody card than the other way round..who the hell has the time to be worrying that they never got a card??? how pathetic..actually i would be tempted to text her and say "card is in the post sorry i didnt realise how improtant a piece of cardboard with my name on it was..you are very fortunate if that is your biggest worry in life, some of us have real problems"