Insomnia is getting worse, i fear that i might have sporadic fatal insomnia, my doctor won't listen to me. he does not take me serious. what to do?

Read this: This is rare, so you probably don't have it. This is able to be DX'd through genetic testing, so you can find out for sure. There is no cure, so if you have it - it is likely to be fatal. There are treatments that can improve life and extend it a bit. All in the article: https://insomniahq.wordpress.com/2013/04/12/sporadic-fatal-insomnia/ Let's hope you don't have it.