evil thoughts

Wa alaykum salam,

I would say it is due to waswas (shaytanic whispers). Since you don't consciously think these things, try your best to ignore and seek refuge in Allah from them.

In my experience, the more dhikr, dua and Quranic recitation one does, the less waswas arises, so try and make it a goal to spend some time (at least 10 min +, if possible) each morning and evening just sincerely connecting with Allah via dua and dhikr.

Following steps will also help InshaAllah, as they will increase your connection with Allah and make you strong enough in iman to repel shaytanic effects:

i. Keep firm faith in Allah above all else.
ii. Strive to make it your purpose in life to attain the pleasure of Allah and have little desire to seek the treasures and happiness of this world.
iii. Strive to fulfil all commandments of Allah. Pray all salah, fast on the appropriate days, give zakat and charity when necessary etc
iv. Pray Surah Baqarah in the house as often as possible, at least every 3 days. It's a long surah so perhaps split it up so that you finish within the three days. If time is a limiting factor, read as much of it as possible. Some is better than nothing. Play the surah on MP3 each day full too. Shaytanic jinns can't enter such a house in which this surah is recited for 3 days, as far as I am aware.
iv. Pray Ayatul Kursi as well as the last three surahs of the Qur'an all thrice after each salah.
v. Prior to sleeping, pray the last three surahs, blow into your hands and wipe your hands over as much of your body that can be reached. Do this thrice. Also recite Ayatul Kursi.
vi. Try to stay in a state of wudhu as often as possible. Sleep in a state of wudhu too.
vii. Adopt patience and recognise this is Allah's test for you.