Is my prayer valid, or must I perform ghusl and repeat the prayer, given that I found wetness on my clothes after waking up, and it was not sticky or yellow, and I was suffering from waswasah (obsessive doubts)?

You are asking about the nature of the wetness you found on your clothes, and there are several scenarios:

1. If you are certain it is maniy (seminal fluid): You must perform ghusl (ritual bath) due to janabah (state of ritual impurity requiring ghusl), and repeat the prayers you performed after finding the wetness and before performing ghusl. There is no sin upon you. 2. If you are certain it is madhiy (pre-seminal fluid): Your prayer is valid if you have washed the madhiy from the penis, the rest of the body, and the clothes, then performed wudu' (ablution) and prayed with clean clothes. 3. If you are unsure of the nature of the wetness (whether maniy or madhiy): If you wish, you may consider it maniy: Then perform ghusl due to janabah and repeat the prayers you performed before performing ghusl. And if you wish, you may consider it madhiy: Your prayer is valid if you have washed the impurity of the madhiy from the body and clothes, performed wudu' and prayed with clean clothes. This detailed explanation is what is given as fatwa (religious edict) by us.