I think I'm starting to lose my mucus plug 😳. Yesterday the doctor said my cervix is about 1/3 of…

I think I'm starting to lose my mucus plug 😳. Yesterday the doctor said my cervix is about 1/3 of the way thinned but not soft and if I go into labor early he said he'd be fine with just letting it happen. Baby looks healthy enough. Does anyone have experience with losing their mucus plug and how long after did labor start?