I think where you live has a huge impact. My ex-gf is celiac and has a much easier time getting food in London than in her home country (Romania) although it's

I think where you live has a huge impact. My ex-gf is celiac and has a much easier time getting food in London than in her home country (Romania) although it's not too bad there either. The gluten-free fad/trend, whether it broadly makes sense or not, has significantly increased the supply of gluten-free products here, both in supermarkets and restaurants. If you're not being taken seriously in restaurants, one trick is to say that you have a gluten allergy. More people will immediately understand "allergy" as something to take seriously whereas many people have no idea what celiac disease is, or sometimes think it's the same as a gluten intolerance. This is technically lying, but given how sensitive celiacs can be to even a tiny amount of gluten (and it sounds like your symptoms are pretty bad) it should really be handled in the same way by restaurants anyway, so don't feel guilty about it. With regards to other people, just be firm, straightforward and distrustful. It's odd how people that care about you can end up trivialising something like celiac disease or think it's no big deal if you have a slice of pizza, etc. They're not being intentionally malicious, but your health comes before their incoherence and ignorance. This is all speaking from the POV of someone in London, so I don't know how well this would work in Lithuania.