All perfect praise be to Allah, the Lord of the worlds. I testify that there is none worthy of worship except Allah and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.
If you suffer from Waswaas (obsessive whispering), then its treatment is to repel it and ignore it. So do not consider that any urine has come out unless you know it with certainty to the extent of swearing that it is true.
If you do suffer incontinence to such an extent that you do not find enough time for purifying yourself and praying, then perform ablution after the time of the prayer becomes due, and you can then perform the obligatory prayer and whatever voluntary prayers you wish with this ablution until the time of the prayer expires (i.e. until the time of the next prayer starts).
If you find enough known time for ablution and prayer (in complete purity), then you should wait until that time comes and perform ablution and pray within it. The Maaliki scholars held less stringent views regarding the impurity that stains the clothes in this case. However, it is more cautious to insert a cloth in your underwear until the time when you know that the incontinence stops, and then you remove the cloth, perform ablution, and pray. Do not repeat the ablution and purification, no matter how much the devil whispers to you to do otherwise. As you can see, the matter is simple, praise be to Allah. The most important advice is to repel Waswaas and to ignore it completely.
Allah knows best.