The pain in the stomach and the feeling of bowel movement at 36 weeks of pregnancy indicate the aura of preterm labor. In this case, you should rest in bed in time, relax, not too nervous, if excessive tension will aggravate the contraction of the uterus, leading to an increase in the chance of preterm delivery, you should timely use birth control drugs to protect the fetus, because at 36 weeks of pregnancy the fetus is not fully developed, at 37 weeks of pregnancy is a full-term baby, and only when it reaches 38 weeks is a mature fetus, so you should try to keep the fetus. It is best to let the fetus reach 38 weeks before birth. During this period you can use intravenous magnesium sulfate or intramuscular magnesium sulfate injection, you can also take oral nifedipine, both have inhibited smooth muscle contraction, relieve the uterus convulsions, contractions caused by stomach pain, can achieve the role of fetal preservation.