Yesterday morning and evening, and all night long my stomach was achin…

Yesterday morning and evening, and all night long my stomach was aching, there was a pulling pain in my lower abdomen and back. Today by evening, my stomach became stony again, it's like it's going to burst soon, right now, my lower back started to give out, and pressure in the vagina. Could this be from such strong training? They will perform a scheduled Cesarean section at 39 weeks. Now I am afraid to start giving birth before 39 weeks so as not to have an emergency.