My OB told me to go to L&D when you've had six contractions in an hour.
Call your doctor as soon as possible just to let them know. Losing your plug doesnt necessarily mean your going into labor right away but its good to get checked for any dilation. Your contractions arent very close together either so im sure theyll have you wait it out if your not dilated enough yet.
When their 3-5 minutes apart lasting a minute. For an hour