TMI.....tightenings and discharge

Gabrielle
32 weeks pregnant and For the last 2 days I have been having lots of tightenings, I can have 8 an hour then they stop. Also discharge has increased a hell of a lot, my knickers are always wet, it's gross (pad time I think) and its stringy. Is there a difference between tightenings and contractions? They don't hurt just a dull period pain.