Weird popping feeling and pelvic pain??

Sierra
About 4 days ago, I woke up with me entire my entire pelvic area super tight and kind of hurting. It loosened up through out the day but started hurting before bed as if I've been holding my bladder forever(wasn't the case) and was gone by the next day. Never felt it again until  Today I had this weird popping feeling down there, which is new (vaginal area) and now my entire pelvic area hurts. Not cramping and not tight. Just a very steady pain. 
Is that normal? (29 weeks today)