I don't think 10lb of each barbell exercise is anything to worry about. Last time I competed my squat and deadlift went down by around 45lb and bench press about 30lb, by the end of the diet.
Within 4 weeks of eating normally again (read- stuffing my face stupid) I had performed personal best lifts on all three. I don't know about others who've competed, but the gains afterwards far exceed the drop in strength beforehand.
Hang in for those last few weeks.