Well you can start if you have all the baby stuff then you see what else you need to get. Just to help pass the time.. I started getting things ready then every week I would buy something from the list I made but don't stress about it. Your just excited. (:
I over pack also, that's why I'm afraid to start now by the time she's ready to arrive I'll be moved in to the hospital lol
I'll be packing as soon as I buy my stuff lol .. by 30weeks anyway. My first was born at 33!
I'm 36+6 but I was told to pack near your eighth month soo I started but I'm still not done.. I'm an over packer (so to speak) and feel I need more. But if your ready I'd say go pack now. It'll make you feel better. (: