Extreme pelvic pressure/pain

Has anyone been experiencing intense pelvic pressure or pain? I started feeling some in the morning when I got out of bed a couple of weeks ago but it would go away after about 20 minutes or so. Today, there is so much pressure and pain I can hardly walk and at times it takes my breathe away. I'm 37 weeks exactly and a FTM. Not sure if this is a normal part of my LO beginning to engage.