If you have a scroll/ring/spell of ALMSIVI Intervention or Divine Intervention (whatever the teleport spells are named), just cast it. Drop stuff you can't carry outside and go in and find the apothecary. Buy restore potions until you're back to normal then go retrieve your stuff
.
If you don't have a T-port, then drop what you can't carry right there and go find some restorative magic.
S_S
EDIT: A 'Feather' or STR buff spell effect would help short-term, but you really need 'Restore' soon.