@confused107 , a lot of the ones I listed are high street shops, so maybe not cutting edge, but ones you can actually get to and try things on.
Dungarees tend to be loved or hated on here. I don't think they make anyone look pregnant. You can go for brand like Wyse, Toast or Finisterre if you prefer more muted colours.
If you have a John Lewis near you, you can book a session with a personal shopper.
Somewhere worth trying would be an independent boutique - brands like Sahara, Masai, Brax, Robell, Foil, Bitte Pai Rand, Olsen etc are a bit more expensive but can look a bit more polished (some of the brands might be a bit more my mum's age group - comfy stretchy pull on trousers etc)
There are quite a few threads on here (what would monty don wear? etc) that are worth a look
Brands popular on S&B include MHL, Toast, Community Clothing, Me+Em, Baukjen, Sezanne, All Saints, Anthropologie etc. Probably missed out loads or included ones that have others reaching for the smelling salts.