Your story is really hard to believe. How can you have up to 18 Bitcoin and not remember your password?
I don't have up to that amount but I don't joke with my passwords or the 12 word phrase. And, oh! That reminds me, what about your twelve phrase backup?

Password doesn't even matter that much, your backup phrase is the most important, if you lose your password you can still make use of the 12 phrase to restore your wallet. So if you're saying that you have up to 18 BTC and you don't even have your backup phrase and also forgot your password, nobody is going to believe your story man.