Noni- there is absolutely nothing wrong with you! You have come through an amazing 9 + month experience growing your baby and you are nearly there. Its such a conflicting time - you experience every emotion during pregnancy like excitement, fear, worry, happiness, tiredness etc and as you approach birth it is no different hun! Your body was made to do this - so dont worry about handling it, you are well prepared and will know what to do as the time comes!
I know the last 3 weeks were the same for me - one minute I was excited, the next I was in denial that I was even having a baby ... just try to take it easy over the next few days, rest, take time out for you, maybe get your DP to paint your toenails, give you a foot rub or have a nice warm bath.
You are about to become a mum and there is no greater or more wonderful job in the world! Good luck over the next few days!