Hi, First of all you need to do Serum
Beta HCG , which is a blood test. Sometimes early pregnancues r not detected on ultrasound except thickened uterine lining. So blood test is important. If it doubles in second sample which is to be done after 48hrs then you are
pregnant. If it increases but less than 66 percent of previous value then u can say it's ectopic. And you may require to see some senior sinologist, who can do proper uSG for u. Do meet someone senior in your area.