guru,s teaching mean guru da pana manana. so by cutting ur hair u already denied guru ji then how do u thing u r following guru,s teaching. hair remind u at every step that u r sikh of guru do not do anything wrong which will bring u shame. it is ur problem that ur trying to satisfy ur mind with these kind of thoughts but sikhi starts from obeying hukam if u r abadoning guru,s hukam by cutting ur hair then how r u a sikh. tell me how many clean shavens have given their head for others but sikh,s. i bet u one thing start growing beard and hairs on ur head and tie a turban u will feel the difference that it will protect u and make u more stronger. it will bring a great peace in ur mind and body. you will think twice before you commit any wrong doing. if this does not help u, then i can only pray for you. and my prayers will make difference