No there is no way of finding out, unless you believe the old wives tales : )
Some contractions are okay, google braxton hicks. If they are irregular and light then they are normal. If they are steady, strong and increase in strength and frequency it could be a problem, in which case you should call your doctor.
Hi there, If they are braxton hicks you are probably fine, but I think it is pretty early, I would call the Dr. What my Dr. told me at 26 weeks was to lay down for an hour and if the contractions are still more than 10 an hour then go to the hospital, however, that was for braxton hicks.