[for the record]
metaljay is my account. i signed up again cos i thought it was a daft name. i looked for a way to delete the account because i didn't want to spam the forum with new accounts, but i couldn't find the option. sorry mods.

[back on topic]
i'm surprised no-one has had any thoughts so far. i ask because i've experimented with valerian and magnesium supplements with ok results.