السلام عليكم ورحمة الله Today I prayed Fajr, and noticed a drop afterwards. By that time, the sun was about to set. I repeated my prayer, but gas exited. So I only prayed a valid Fajr after sunset. This is not the first time this happens, but it is out of my control. What is on me?

If you do not know whether the drop came out during the salah or after it, your first Fajr was valid and you repeat nothing, so do not fall into waswas. If the drops or wind come out continuously and do not stop long enough to pray, make wudu after the time enters and pray, and what comes out does not harm you.