This is probably a really stupid question but how do I know if I am lactose intolerant? Before my diagnosis I ate anything and everything and felt pretty rubbish although I have always cooked most things from scratch. I have been gf for six weeks and don't feel much better but am aware that everyone is an individual and as marywales says I didn't get this overnight so it's going to take time. The dietician said to cut out lactose for the first 6 weeks so I have. What would I expect when I re introduce into my diet ?