If Pakistan is not bailed out, you would see shortage of all kind of commodities.
For example shortages of Petroleum Products, natural gas, food items including wheat , medicines and many others which cannot be predicted now.
Some international companies may cease operations in Pakistan, like Airlines.
You may see accelerated devaluation of PKR .
Banks has already started rationing USD, which is usually first sign of impending liquidity crunch. If things gets too bad for too long, like in Lebanon or Venezuela, then businesses may resort to accept USD/Euro instead of PKR.
But I hope I am wrong.