I am experiencing a change in my nature(nafs) im having these bad thoughts, and I am having uncontrolled abnormal desires that is unusual for normal people and it is very distressing. In Islam, How do we normalize our human nature and regain our cleanliness in our soul. And how to purify your mind and heart?

We have to see our behaviour and our diet as well as our company. Both the things we eat and the people we associate with can affect us negatively and positively. Therefore we need to pay attention to these things. In addition, we have to spend some time alone in contemplation in order to get closer to our nature and purify ones self. The best way of purity is to get closer to Muhammad and Aale Muhammad peace be upon them all and try to emulate their lofty behaviour.