When to buy maternity clothes?

Harpo

I’m very bloated just now, so much so that my jeans and work trousers hardly fit me anymore and are uncomfortable to wear. I’m only 8 and a half weeks (with my first baby) will the bloat disappear before my bump comes or will I not be able to fit in my trousers again? I don’t quite see the point on buying trousers that will be too big for me next year when I could just buy maternity trousers that will fit for a while but at 8 weeks it’s a bit early to be wearing maternity clothes. Does anyone else have that problem?