In reply to timmyhobby:
The answer would depend on how bad it is, but if its just a lost toe nail then you should be able to carry on climbing.
I would cut the nail back as far as you can, and tape it to stop movement until it drops off.
Depending on how tight you wear your shoes, you might want to get some non aggressive ones until things improve. You could always ebay some second hand ones then sell them later?
You may find climbing harder in the short term, but you'll see a big jump once you get your good shoes back on.