How much is too much?

A
Happy Monday all. 
​I have a question about weight while trying to conceive. 
​How overweight is too overweight. I am heavy but relatively fit (3 spin classes a week mostly healthy eating) but just wondered have you had any advice on weightloss from your health care providers. I don't think BMI tells us an awful lot some times. All blood pressure and bloods etc are always fine.