Damp panties?

I will be 38 weeks monday. My last check (wed) I was 3cm and my dr wiped my membranes. Since then I have been loosing pieces of my plug. But have also noticed when I go pee (usually after nap or sitting a while) that my panties are damp/moist... not sure if it's excessive discharge, pee leakage or possible fluid leakage.. Curious if any others have had this happen... or have it happening..contimplating whether or not I should go in to be checked for possible fluid leakage..