Depends where you live in the country.
Before you go any further with the try and blow it out option can I suggest you speak to a hyperbaric medic type person in case it really is bloody stupid.
http://www.nationalhyperbariccentre.com
As a suggestion.
If they arn't willing to help with advise they should be able to point you towards a consultant who does know. One of the chamber divers will proberly know someone to speak to or have an old sat divers trick of sorting it out.
but google threw up quite alot of hits in the UK. Seems to be quite the done thing these days.