good luck with whatever you decide - the only other thing you might want to try though is switching from cold shakes to hot, assuming you are having them cold.
I can't stomach the shakes at all when they are cold and have all of mine hot and those I can stomach without a problem. Cold literally make me retch and can't stand them.
But as someone else already said there is no shame in switching to a diet that suits you better right now - I know that most people think CD is the easy option but it so isn't and it is about as mentally hard to stick to as its possible to get. It is right for some people and it isn't right for others and at least you gave it a shot to see if it was right for you.