Welcome to HCM,
Bleeding and spotting after abortion
for a couple of days is normal.
But bleeding for 10 days and again after 15 days of abortion with so much pain in lower abdomen doesn't seems to be normal.
test detects Human chorionic gonadotropin
It is produced by the trophoblastic cells of placenta.
for pregnancy is more reliable than urine test, thus you can repeat pregnancy test with blood.
In your case, it is possible that some part of placenta is left during abortion, and it is causing problem.
Please consult your Gynecologist for examination and treatment accordingly.
Thanks for trusting Healthcaremagic and posting your query.
Hope you found my response to your query informative and helpful.
With good wishes,
Dr.Chandra Shekhar Sharma