38 weeks 5 days

So tonight I've been trying to get things ready for my c section which is next Friday @ 7:30 AM. I'm feeling sick to my stomach haven't wanted to eat but forced myself to eat a little something for dinner. My lower back is hurting. Tried to take a warm bath still didn't help me. I've literally cried because my lower back was hurting.
Do you think it could be labor ?