In early pregnancy, if you have left-sided abdominal pain, the first thing to look at is the nature of the pain, whether it is constant or paroxysmal. Because there are more cases of stomach pain, if the pain is paroxysmal, the first thing to consider is the possibility of gastroenteritis, bad food or a cold stomach. Gastroenteritis is often accompanied by nausea, vomiting, and in some cases, diarrhea. If the pain is persistent and severe, suspect the possibility of ectopic pregnancy or ovarian cyst torsion. There is also the possibility of urinary stones, which should be further determined by ultrasound and treated according to the situation. If it is gastroenteritis, rest and diet should be taken care of, and it may be relieved.