Labor signs ?

I've been experiencing extreme fatigue to the point where I can fall asleep sitting up.... I've had to pee a lot but when I go only drops come out . Today When I got up I started with cramping and when I walk it feels like baby is lowering himself ???? It's painful to walk... I know it doesn't matter but last Thursdays I was 2cm and" super thinned out " also feeling pressure like have to poop but nothing ? Possible labor ? I'm 38 weeks 2 days