In reply to Beth-Cath-T:
If you can hang on long enough to have a rope lowered, can you not;
-Traverse to easier ground
-Downclimb to more gear, place and lower off
-Place a load of gear, lower off gently
-Find a rest, recover then try the section again
-Retain some dignity and fall off
Grade is not that relevant, to my mind. I guess I think that if you launch up a route with it in the back of your mind 'oh, I can just ask for a rope if it is too hard' then you are not fully committed to that route. Bear in mind that I am a notorious coward who only climbs stuff he is relatively sure he can get up safely.
That said, glad you didn't shatter your ankles because of daft pride.