Anybody Else Had This Problem ??

So I'm 33 Weeks I've Been Having Mild Contractions For The Past 3 Days Now But I Went To L&D Yesterday Due To Having My Youngest Son At Home My Dr Told Me Anytime I Feel Contractions Consistently To Go Get Checked ! I Also Lost Parts Of My Mucus Plug Last Thursday , But They Checked Me Ran Some Test N Everything Came Back Negative & They Said My Cervix Is Still Thick & High So I'm Not Really Understanding Why I Keep Having These Contractions ! This Is My 5th pregnancy & It Hasnt Happened With Any Of My Other Children Definitely This Early ! They Said Dehydration Could Make Me Have Them But They Also Said I Seem Well Hydrated ! 🙄