Hey MoBOB,
What were you using to lift the shingles, most guys around here use a spade or you could use a special
shingle lifter like these examples.
I have used a shovel and a pitchfork before but you have to be careful because the nails can pop out and end-up on the driveway resulting in flat tires.
Roofing is never an easy job, I am being lazy this year and having my house done by a contractor.
Good Luck tomorrow and Stay Safe Up There!
Mike