slima
I'll start!
1. The 737's can't dump fuel, so that option is ruled out.
2. Why have you climbed there to start with?
3. You can safely descend at current speed to an appropriate level - the coffin corner gap on the speedtape will open quite rapidly
4. You won't stall - you may get a stall / overspeed warning if you speed up/down/climb - but you will still have the mandated 1.3g UK (1.2g in some states) margin
On a B747-400, the max alititude increases by about 1000ft per hour as fuel is burned, I can't remember what the B737 family numbers are.