Im not sure if it is lactose issues, as I can eat half a kg of ice cream and be fine, which has more lactose than WPI does. The protein I was using was ON natural, reflex natural and powernutrients natural, the only thing they all have in common is cocco, but I can eat chocolate and be fine which also has cocco.
WPI gives extreme issues, where as full cream milk only gives very mild issues, which is what made me think I was building up an intolerance to whey.
I thought about taking lactase tablets but taking them everytime could quite possibly down regulate my own production of lactase, so Im giving myself a couple of weeks off and will try again to see if I still have issues.