feel for you mate, like a lot of people i've been through some real rough patches too.
for what it's worth, i'd go straight to the doc, tell him how bad (and how extreme it's making you think), the doc will sign you off for 2 weeks, with a follow-up appointment and probably another 2 weeks, and so on. the doc will probably also try to give you pills (i'd try to avoid that unless necessary, it's a long road back), use the time to take stock of what's good in life, and work like an animal to sort the crap stuff out - i.e. job searching etc.
oh, and the mrs had a small toe broken last year to re-set it - still hurts her constantly 3months or so later.
i had my nose broken 18 yrs ago as a kid, i've suffered on-off with sinusitis ever since and now need an op to make sure i don't go blind.
i think what everyone is trying to get at is, sort the stress rather than giving yourself more worries mate