37 weeks and vaginal pressure?

I am a little over 37 weeks & a first time mom. I'm having a lot of vaginal pressure today. To describe the pain I am feeling, it's like ths day after riding a horse for the first time. I've also used the restroom 3 times today which is more than normal, TMI sorry! /: I'm not sure what this means or what's going on. I'm new to this. Any advice is appreciated!