Changing tastebuds?

A couple months ago if you would’ve handed me McDonald’s burger and fries I would’ve destroyed it in minutes. Now, after losing 40 lbs from eating clean and working out, nothing I used to like tastes good to me anymore. Chocolate tastes bland, coke (which I used to be obsessed with) tastes flat & all the greasy fast food makes me nauseous. Is this normal? I’ve never lost weight and dieted like this so I don’t know if this is a normal thing