37 weeks today and don’t know what to do. I’ve been having a lot of painful pressure in my butt and…

37 weeks today and don’t know what to do. I’ve been having a lot of painful pressure in my butt and pelvis. Now I’m getting stabbing pains in my lower stomach. It’s hard for me to walk or even stand up. This is my 3rd child but I never experienced this with my other 2. Trying to figure out if it’s labor or not.