am i going to go into labor early?!

i'm 33 weeks pregnant, and last week i had to go to the ER because i was having contractions in the 60's, they gave me a shot to stop them, but my cervix was still closed, and my water wasn't broke. now i'm feeling a lot of pressure in my lower abdomen & i have to the feeling to push, and i feel like i constantly have to poop/pee. this morning when i discharged there was a string on whitish/yellow sticky discharge like snot. what is all of this?