I'm 24 weeks pregnant with my second baby and my son is 15 months.. yesterday I went for a mild hike and went up this hill pushing my son in his stroller and I stopped half way up it drank walker and continued but I started getting severe cramping and sharp pains on my lower tummy and my back has been hurting so bad I woke up today with my body sore, does anyone know what it could be? Or has this happen to them?