What are the exercises you feel that you can do? I mean, can you use the rest of your fingers on the hand with the broken thumb? I that case you should be able to deadlift, maybe higher rep & lighter than normal, focusing on form and maintenance. You should also be able to squat, so that is a given.
It would probably be a good idea do SD now, instead of trying to do two more weeks of 5's.
Regards and good luck,
/ R