hand quilting ?

Hi all.............it has been a long week of snow and cold temps here in MN Hope Spring gets here soon ! My question about hand quilting is this..........I have a quilt that I hand quilted several years ago. It is on my husband's bed. When I make up the bed in the morning, I can hear (and see) the threads popping in my hand quilting. I try to be careful and not put a strain on it, but still, my quilting is not holding up. Did I do something wrong, or is that just the way hand quilting is? Makes me sad to see my work disappearing......... any advice will be appreciated !
Marilyn in MN