hi im 36 weeks pregnant and i have been having lower throbbing pains in my back and pressure in my pelvic area. i cant sit down for more then 15 minutes without feeling uncomfortable and i have reason to believe that i have lost my mucus plug around a week ago.. i am not getting anymore discharge of any kind and was wondering if i could possibly be going into labor?... this is not my first pregnancy.. i have a 1 year old at home..