Rectal pain?

I’m 38 weeks today and I was walking around and got this really painful pelvic / pubic pain which I’ve been experiencing just not as painful as that one . I know that’s normal . I’ve been losing chunks of my plug and a lot came out today which I also know doesn’t mean much . But shortly after getting the pelvic pain I got this really bad pain and pressure in my butt . I had to hold on to the washer and dryer and couldn’t move . I did go to the bathroom cause I thought maybe I had to go but only a tiny bit came out . Then I got crampy . Does this sound normal ??