Is looking at people's clothes and scrutinizing them in order to offer advice a form of waswasah, knowing that I previously suffered from waswasah?

Your scrutiny of people's clothing does not necessarily indicate obsessive-compulsive disorder (waswasah). It is common that when a person is convinced of a ruling, they become more perceptive of its implications and more attentive to it. Know that the prohibition of izbal (letting one's garment hang below the ankles) for reasons other than arrogance is a matter of ijtihad (definition) (independent juristic reasoning). Furthermore, the fact that you may have been obsessive-compulsive in the past does not mean that this particular action is waswasah. We have previously mentioned ways to overcome obsessive thoughts.