37 weeks pregnant... Tons of pelvic pressure... Impending labor?

I'm 37 weeks pregnant, for the last couple days I have been so tired and getting cramps here and there. I have been losing my mucus plug for about 2 weeks now, but today there is so much pressure in me pelvis feeling like the baby pushing down, it's so bad I can barely walk, and when I'm sitting it feels like I'm sittingnon her little head... Could any of this be a sign of impending labor, maybe not imminate but soon?