Hello,
Since you had unwanted 72, which is a high dosage hormonal pill that causes a hormonal imbalance in body, it might be the reason behind spotting, bloating and backaches. It is unlikely for you to be
pregnant.
I would suggest that you visit my clinic International Fertility Centre located in New Delhi for further evaluation. My clinic offers varied gynecological treatments and services and ensures that you have a successful treatment. You can share your contact details to reach you.