is this okay

Adika • just a bomb ass mom who all her dreams came true when i gave birth to my son. wifey since nov 2016
So I finally had my first round of contractions or Braxton Hicks or whatever while I was at work today for a good i say 2 hours my stomach was hard my pelvis was hurting my vagina was hurting my back was hurting I'll just keep walking walking walking but it definitely felt like contractions or I guess Braxton Hicks even though they were uncomfortable I was super happy it happened because at least now I know I really won't be pregnant forever just to be sure is that normal at 31 weeks?????