Frustrating Past Couple of Weeks

For some reason I have really taken a step backward the past few weeks. I was climbing steadily at 5.10 and working toward 5.11, but now it seems that I struggling to get up pumpy 5.9s and fall often on easy 5.10s. My forearms are really suffering on these days. I know that warming up is crucial to my performance, as is strength and endurance building, but I should not be feeling as weak as I am.