I bled 8 days after taking Unwanted 72. Was that my normal period or withdrawal bleeding?

Hi doctor,

I have been using birth control pill (Crisanta LS) from last 2.5 years.This month I started on 13, and I doubt I missed 1 or 2. After 13 days of starting the pill, had safe sex with a condom, but we doubt that it broke. To be safe, I took two doses of Unwanted 72 the next day and stopped regular birth control. After eight days, I got bleeding, and it lasted for five days (same number of days as my regular period after stopping pills every month). What was that bleeding? Was that my normal bleeding or withdrawal? I am confused as this was near to expected period. Then, I did HPT, and it came to be negative. What are my chances of pregnancy? Does this bleeding confirm that I am not pregnant?

Somebody suggested that I can start my regular birth control pills and I started. After 10 days, I got my full abdomen ultrasound done. It indicates that no focal lesion was seen and endometrial thickness is 4 mm. Uterus size is 88 mm - 43 mm - 42 mm. Do the thickness and report confirm that I am not pregnant? What is the normal thickness at this stage if I am pregnant? Also, the doctor suggested me to stop birth control pill until I get my regular period. Is that correct? When should I expect my next period? As I had regular birth control pill for 10 days, will it affect my next period?