Sounds like you were just dehydrated.
Same thing happened to me the other morning. But they went away by themselves so I'm guessing it was false contractions.
Yes if u get dehydrated it can cause that. But I would also call ur ob and let them know what happened so they cab rule out early labor
Yes, you were probably starting to get dehydrated so when you drank the water it helped. I had to go to the er a few weeks ago for bad headaches and contractions and they said I was dehydrated