Close Cervix at 38weeks FTM

I'm on my 38 weeks,1 day already. 1st time ko pong maIE kanina and still close cervix pa daw. Pero nagstart na kong makafeel ng backache radiating to my pelvic with pressure and dysmenorrhea like pain accompanied by contraction sometimes. Still no any mucus plug. Nagwoworry na ako kasi inspite ng pagwalking ko in the morning and afternoon, squatting and bouncing sa gymball before going to bed, eating fresh pineapple everyday, drinking pineapple juice and raspberry tea but still close cervix pa din. What to do po? any advice po? Thank you sa makakapansin.