How long after??

I noticed yesterday morning that my belly had dropped, I had about a half cup of pineapples bc it was starting to sting my tongue. This morning I went to go poo (sorry tmi) and I noticed I lost my mucus plug again when I wiped. So far I have these light cramps. I'm 37w+3d, I have a OB check up tomorrow morning and I know last week I was dilated 1cm but still thick