Hi there,
I too am over weight, being a size 16-18. Our doctor didn't give us any info on complications or anything either, just to eat a balanced diet and exercise.
I've been worrying that my weight will cause issues or something too. I know I'm not really being at all helpful, but i know for me it's nice to know im not the only one with these concerns.
All you and I can do really, is to eat a balanced diet, and exercise, not really too loose weight but more focussing on being healthy :D
Bit of a ramble, but i hth in some way x