Must one exit the prayer and repeat ablution upon feeling some urine come out after ablution and entering prayer, knowing that an attempt was made to clear the urine before prayer, and sometimes a tiny drop is discovered and sometimes not?

If your feeling of a drop of urine exiting is merely a doubt, then do not pay attention to it and proceed with your prayer, because a state of purity established with certainty is not removed by doubt. However, if you are certain of its exit, then you must exit the prayer, perform Wudu again, and then resume the prayer. We advise you not to prolong your stay in the restroom and to dismiss intrusive thoughts.