Hi Paula,
Thanks for the reply. I've not been to a Doctor, no - I'm a little suspicious of the pharmaceutical approach to be honest. I probably will if I get into a similar situation to the last few days again though, it wasn't good.
Anyway, in addition to a few more job applications I've been out and about a bit today - went to the gym again for the first time in a while (I'd forgotten how good I feel after deadlifting) and have been into kitchen and spoken to one of my flatmates. Feeling better now but will keep an eye out to ensure I don't get so isolated again!
Thanks