The only bit of advice I can give is to have a word with your Doctor who might be able to help and to not make any hasty decisions
When my son was small we had real problems as he was dyspraxic and it was really affecting his speech. We lived in the french speaking part and he could not speak any french. My doctor put me in touch with someone but it was not helping.
I took him over to the UK and embarked on therapy and got them to suggest exercises etc and was then confident enough to do it myself.
This was some time ago and I am sure that now there will be groups etc in your area which can support you.
Can the International school help at all - do they have any teachers who might be able to help privately?
I really hope that you sort something out - I know how stressful it is - there must be other people who have a similar proble.
Good Luck