Part of "the show"?

Went in for my 35 week appt yesterday and he checked my cervix.. have been having conteactions intermittently the last 5 days and dr said i was almost 2 cm dilated.. i dont think I've lost the plug yet but last night there was a tiny bit of bloody mucas and then this this morning.. i feel ok but i can feel the pain in my lower back starting up again.. 36 weeks tomorrow and he's measured big since 20 weeks.. I'll feel fine about him coming any time, just want to make sure this is what i think it is and isnt really cause for concern...