Here are some symptoms that your spiritual jeevan is in trouble:
-slipping amrit vela and even attempts to wake up are not successful. Waking up consistently after amrit vela is the eventual conclusion of this trend.
-increased time on internet and in front of tv
-less paath and missing banis; no desire to do paath
-dropping "small" rehits like doing keshi ishnan, doing kangha twice a day, etc.
-less concentration and ability to do paath and simran
-less desire to go to gurdwara and stay in sangat
-increased vikaar especially anger and kaam
-rationalising faults and mistakes in rehit as "acceptable" and "undertandable" or "I'll fix it later..."
-serious mistake in personal rehit
-ego and pride
-looking down and belitlling other Gursikhs
-ardaas to Guru Sahib for forgiveness
-speaking to other Gursikhs about problems
-Peshi before punj pyarai for serious mistakes in rehit
-Going to sangat even if there is no desire. Forcing yourself to go no matter what.
*note* : It's best to recognise the sickness early and combat it. Otherwise, things keep getting worse till you're in real trouble and recovery is a big uphill battle.