37+2 contractions or not?!

Babies was low in pelvies at my 36 week midwife .. 
Yesterday part of my mucus plug came away and some more today and watery discharge i feel abit "wierd" my belly is tightening on and off but i dunno if its how his moving also feel abit achy low .. i was late with my first so i assumed i would be again do u think its start of something or am
I being silly (i did labour 4years ago so cant really remeber how it feels when it starts) as itsvery different this time..