I would call your doctor about it. I see that this was a day ago--- so do come back and update. But generally, contractions should be consistent before going into the ER unless the doc says to. Starting and stopping contractions is common. Let us know how it went and what you did!!
Hi I think you should, because you don't know if you are already dilated alot or a bit... but you should go and let them check for you, that was you don't have the risk that baby could pass the delivery... good luck to you and congrats on your baby!! :)