first you better consult gynecologist and confirm your pregnancy as sometimes home pregnancy test kits can give false positive results, so you go for blood test
to detect pregnancy and to estimate gestational age
if pregnancy comes positive with your doctor's advice you can go for termination with medical method if gestational age is less than 8 weeks, repeated termination can definitely affect your general health as well as reproductive health,
so better to use some regular contraceptive
method as natural method is failing in your case.