How thick the endometrium is does not mean that you are pregnant; a thick endometrium is not specific to pregnancy; other things such as pre-menstrual periods, endometrial polyps, hyperplasia, and lesions can be manifested as endometrial thickening. Endometrial thickening can be seen at the beginning of pregnancy, but endometrial thickening is not only seen at the beginning of pregnancy, endometrial thickening before menstruation, endometrial polyps, endometrial hyperplasia, endometrial lesions and so on can be manifested as endometrial thickening, so endometrial thickening does not mean that you are pregnant. If endometrial thickening is accompanied by a positive pregnancy test or elevated chorionic gonadotropin values, pregnancy is indicated, and a follow-up ultrasound is needed after a period of time to confirm the pregnancy. the presence of a pregnancy sac in the uterine cavity with a yolk sac visible inside the sac on ultrasound is a clear sign of intrauterine pregnancy. If you feel unwell, you should go to the hospital and consult your doctor.