I would always call my Dr first, unless I was having actual textbook contractions 2 min apart for more than 15 minutes, in *severe* pain, or bleeding... then I would go straight to the hospital.
You could be in labor. I had back labor and it was NOTHING like what they described in the books, yet it was actual 'real' labor.
But you can be dilated to 1 (or 2 or 3 or 4) for weeks and be having braxton hicks contractions. your hips hurt and it hurts to walk and you feel pressure probably because the baby has "dropped". Again, that could mean you have a baby tonight..... or it means you feel like this for the next 3 weeks.
ONLY your ob/gyn can tell you what is going on. So, give them a call, explain EXACTLY what is going on. They may even have you come in and see them to tell where you are.
Good luck!