anyone else had sharp pelvic pain?

Amanda
Tonight I started having off and on really sharp fast pelvic pain. Like right above my pelvic bone. It just last a second and is gone, but it takes my breath away. 
I had this a couple weeks ago and mentioned it to my doc, and he seemed completely unconcerned. I feel like that's not normal though. There is no consistency to them either. Just random. Has anyone else had this? I have a doctors appointment tomorrow. I'm 36 weeks and I was dilated to a 2 last week at 35. I also think I might have lost my mucus plug 2 nights ago.