end of pregnancy depression...? help me please.

is end of pregnancy depression a real thing or am i crazy? i’ve never been depressed before (post pregnancy or during pregnancy) and have these feelings i’ve never felt even early being pregnant. i’m due in 5 days. constantly sad, crying, i’m not excited or happy about anything. everything upsets me. i get that my hormones are ALL over and some of these are normal, i just never felt this way and i’m worried i might get ppd. i dont know what to do it how to help myself.