Strange and unusual pai

I guess its not like a bad paine just a continuing dull pain that some times gets a little worse then others but it has been constant the last couple hrs and its slightly painful to walk. My pain tolerance is fairly high but this is rather interesting im not really sure what it is but its all under my baby belly like period cramps. Could it be contractions? Not Braxton hicks? I am an ftm and 33 weeks and 6 days.