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You should immediately consult an obstetrician. First of all you will need an ultrasound scan to confirm gestational age
and location of pregnancy
If the gestation is less than 8 weeks and if the pregnancy is within the uterus
, then drugs are available to abort the fetus. The drugs should be taken strictly under medical supervision as complications are known to occur, where you will need medical attention.
If the gestation exceeds 8 weeks then drugs cannot be used to abort. Hence the emergency that you do not delay and consult the doctor immediately.
Wish you all the best.