Skip shoulders and any compound movements that utilize them (i.e. bench, most chest exercises, etc). Take your off week this week and recover.
Something that has always worked out for me:
I constantly keep working out and leave my rest weeks for either injuries (strains, in your case), vacations, a massive school load, things like that. If after 2-3 months none of these have applied, ill take my off week and relax. Remember, off weeks are key for growth as well. You don't grow in the gym, you grow when you rest.
__________________
7/7/08, 8/15/08
Height: 5'9"
Weight: 188, 184 lbs.
Bench: 225, 235 lbs. (10 reps)
Squat: 285, 315 lbs. (10 reps)
Chest: 40", 41.5"
Waist: 33", 32"
Hip: 39.5", 38.5"
Thigh: 23", 24"
Bicep :15", 15.5" (relax), 16.5", 17" (flex)
Caliper BF% test: 14.9%, 13.8%
"The last three or four reps is what makes the muscle grow.
This area of pain divides the champion from someone else who is not a champion."
-Arnold Schwarzenegger
Quitters never win, winners never quit. | 
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