Zoheir Ali Esmail, Shaykh Zoheir Ali Esmail has a Bsc in Accounting and Finance from the LSE in London, and an MA in Islamic Studies from Middlesex University. He studied Arabic at Damascus University and holds a PhD... Answered 3 months ago

Bismillah

Thank you for your question. In this situation (if you are not sure if you have prayed 2 or 3 rakats), if you are not someone who doubts too much, you would have to pray the fajr prayer gain.

May you always be successful.