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First of all, you say that you wish to wake up one day and be free from it. Allah Ta’ala is the Sovereign and Most Powerful and can do anything BUT it is possible that it may not happen.
Like any other problem you need to work at it and it simply won’t go away one day.
Most Ulama, Mashaykh and people think that it is simple for you to “Turn Off” your thoughts so they continue to tell you not to dwell on it etc but it isn’t that simple.
The issue is of “consequences” and not thoughts and whispers.
The reason you are dwelling on thoughts is because you think that the consequences of your fears are so grave that it warrants you to clean the Carpet again and again and again. Why? What if the carpet is unclean? Apart from you praying on it, what difference does it make if it has minor impurity? Why don’t you have a roll of garbage bags (bin liners) and just roll a brand new one of the floor and pray? Its brand new so can’t be dirty.
Just an example for you to think about consequences (of your worst fears)
Secondly, it is difficult for human mind NOT to think about something. For example, if I have the urge to look at a woman it is difficult for me to NOT think about it. But it’s easy for me to divert my mind and think about something else (and in the process I lose the original thought).
The latest psychiatric help is based on “behaviour therapy” and less focused on thought process.
For example, if a patient thinks that by touching something they need to scrub their hands again and again. Patient is deliberately told to touch something and then PREVENTED from washing hands.
Just to make a point about consequences i.e. you touched the dinner table and you didn’t wash your hands WHAT HAPPENED? WHAT were the consequences?
Do your Wudhu (follow the Sunnah) while someone is watching. Wash limbs 3 times and the other person should force you to pray.
What happened? Nothing! You just prayed.
This cannot be undone and I am sure it will be greatly appreciated.