Ruling on taking pills to prevent the onset of menstruation for one who intends to perform 'Umrah

Question: A woman asks: I am a woman who took pills to prevent the onset of menstruation in Kuwait and felt severe pain, then I stopped taking these pills. Then, four days later, which was last Monday, my period started and continued on Tuesday and Wednesday. We left Kuwait in the morning, which was the third day of my period. In the middle of the journey, at 8:30 PM, I took two pills of the same medication, knowing that its effect appears after 24 hours. We arrived at the miqat at 2:00 AM on Thursday, meaning five and a half hours had passed since I took the pills. However, since arriving at the miqat, no blood has come to me. I entered the state of ihram and went to the Haram, but I was uncertain about my situation because I did not check carefully whether the bleeding had stopped or not. A few minutes before entering the Haram, I went to the bathroom and no blood had come to me, so I performed 'Umrah. But when I went to the accommodation, a little blood came to me. This has not put my mind at ease. Is my 'Umrah valid or not? May Allah reward you with good.

Answer: From 'Abd al-'Aziz ibn 'Abd Allah ibn Baz to the honorable sister in Allah, S. S. May Allah guide her to what He is pleased with, amen. Peace be upon you, and Allah's mercy and blessings.
I have understood your question as stated in the attached paper, and I inform you that your 'Umrah is valid, praise be to Allah, if the reality is as you described. May Allah accept from us and from you and from every Muslim. Peace be upon you, and Allah's mercy and blessings.
Grand Mufti of the Kingdom of Saudi Arabia