I am highly allergic to seafood which includes fish sauce and oyster sauce what can I substitute for them ?

Also here in Australia I've found that most soy sauces use fish sauce and when I have my allergic reactions I am seriously ill. I usually use worscheshire sauce but lately my girlfriend says it doesn't taste the same - what can I use instead that may taste more like these sauces? I'm talking in dishes like pasta bakes where I can't just use one thing on one side and one on the other and I am HIGHLY allergic.