M&S free from food is incredible- the bread is unbeatable. Yes it’s not cheap, but no GF bread is, but anything they do is delicious.
tesco GF range won prizes, Sainsbury’s GF range and Morrisons GF range are fantastic
you’re in shock, but you will find your way through, it will get better.
remember too that the biggest proportion of people with gluten intolerance is in italy, so the range of GF pasta is amazing. Rice, potentially wholemeal rice is a good filler, quinoa is a great food for a couscous replacement for example and with some experimenting on dressings you can have wonderful results.
We have an amazing company near us ABasing Bakes, their pies are all GF and oh my god they are amazing, they sell them at a number of markets and are wonderful
my oh eats rye bread daily and that I think has no wheat gluten, so maybe that’s an idea for you too.
chin up, it’ll get easier as you explore options