The 35th day of pregnancy belongs to the early stage of pregnancy. In early pregnancy, the stomach is vaguely painful. As the uterus gradually grows, the pressure on the surrounding internal organs becomes greater, thus making the pregnant woman feel bloated or have slight pain. When the growth of the uterus squeezes the intestines and bladder, there will be a slight pain in the lower abdomen, which will be gradually relieved when the body gets used to it in the later stages. If the pain persists or is relatively severe and is accompanied by vaginal bleeding, you should be aware of the risk of miscarriage or an abnormal pregnancy. Consider going to the hospital for a series of examinations, including blood HCG test, gynecological routine and pelvic ultrasound, to make a clear diagnosis, and consider targeted symptomatic treatment.