Pregnancy miscarriage. Early pregnancy?

Currently I am in Mexico, my last menstrual period on 20 march 2017, my regular average cycle is 28-30 days. I missed my period this April so I took home pregnancy test on 28 april Friday it was positive. Then suddenly started heavy bleeding 4,5 hours on 1 may then stops. Then I admitted in emergency for check up they did my blood test was positive means pregnant, urine test had no infection. They did my ultrasound didn't find any sac image so doctor told me you were pregnant and I miscarriage. Then little spots. Today 4 may I had a lots of abdominal pain cramps started heavily bleeding. So tell me exactly what's going wrong with me due to this condition. Please help me out of this miscarriage or early pregnancy? Here Dr. said for surgical cleanup, but I am returning India on 15th may, so I don't want to be done here in Mexico, please recommend me some medication to control the situation of pain.