Hello Welcome to health care magic Dear patient, abdominal pain during pregnancy can be due to many reasons which may be related to pregnancy or unrelated to pregnancy. Pain related to pregnancy include, abruptio placenta, endometritis, salpingitis ectopic pregnancy, red degeneration of fibroid uterus,fatty liver of pregnancy, labour pains etc and pain unrelated to pregnancy include gastritis, cholelethiasis and chloecystitis, urinary tract infection, renal stones, appendicitis , low back pain due to disc disease,etc. Leg pain following abdominal pain and vomiting can be due to electrolyte disturbances like hypokalemia. You consult your gynecologist who will get some tests done like USG abdomen, urine routine and microscopic examination,LFT ,RFT and other necessary test to find out the cause of pain and will then give you the treatement accordingly thanks Good luck Dr Arshad