Question

I'm 39 weeks tomorrow and today my doctor checked me and I'm still 1cm dialated but now 60% effaced. She swept membranes today also. But scheduled a ultrasound for next week to see how big baby is so we can induce. My question is does sweeping membranes mean I'll go into labor forsure in the next 48hrs? I hear and read a lot of women saying they go into labor soon after sweeping.