Hello, I'm 26 weeks pregnant, my belly has been hurting since morning …

Hello, I'm 26 weeks pregnant, my belly has been hurting since morning like period cramps or like something is spinning inside, it's unclear, I called the doctor, they will come only tomorrow, please calm me down for now that everything is good ? that someone had this at my due date and everything is fine now ? the baby was active all morning ☺ constipation maybe because of this?