Call the hospital now! If they are constantly 5 minutes apart you need to get there ASAP! Even if it's false labor it's still hard false labor--and they will either want to go ahead and let you have the baby or they will try stopping your contrations. It's not a good idea to drink castor oil at 36 weeks because your due date could have been slightly off by a week or two, as not all babies develop the same in the womb. But since the deed is done, call now! Don't even read this! Get off of the computer and call! :)
Now!!