It's not abnormal to have contractions for a month or more with a second pregnancy. It could also just be really strong Braxton hicks, I had that in the few days before I went into labor. If I were you I would just give my Dr a call and ask if they could check you to be safe.
It might be labor but since you mentioned baby is moving less I would ask your dr to check you just to be sure.
Always better to play it safe
Thanks ladies! Been to doctor in emergency. Baby is doing fine. Having contractions only very far now. They have sent me back until they are at close intervals.