The pain is a lesser problem than getting chronic kidney infections. If you know the stones are the cause, you need to see a urologist to figure out a solution. Recurring inflammation from the stones and infections can cause more and more problems as you age, and may potentially affect your renal function down the line.
It is most likely this. OP is one of the unfortunate people that just cannot use marijuana safely due to his biology. If you have cannabinoid hyperemesis, best to stay away from weed because the constant nausea/vomiting can lead to unintentional weight loss and a lot of other physical problems that are no fun.