Hello Doctor Six Months Ago My Doctor Diagnosed That I

Hello Doctor
Six months ago my doctor diagnosed that I have hormonal imbalance and gave me the course for three months to regularise my periods.
I had regular periods after that. I had to go for a vacation so delayed my periods by taking meprate for ten days. After I stopped meprate I had my periods but the bleeding didn't stop and the doctor gave me Trenaxa MF for stopping the bleeding.
I stopped the third day and immediately stopping I had unprotected Sex with my husband. He is sure that sperm didn't go inside but I m scared.
I am 40 and on n off have problems with my cycles. Mainly my question why the bleeding didn't stop after I stopped meprate and secondly what are my chances of getting pregnant if something might have gone wrong.