I asked a very similar question a couple of years back:
http://www.pprune.org/forums/showthr...threadid=89539
My (probably rather naive) instinct was to climb to MSA, concentrate on straight and level and declare a mayday. As a lot of people have already pointed out, this is extremely risky without an instrument qualification.
The consensus of opinion was that it’s better to stick it down in a field and risk a low speed prang than climb into the unknown, where it would take all of your capacity just to maintain wings level.