Hi laur88 I don't know what an SI is, but it could be a form of OCD and/or a reaction to anxiety/stress. I have OCD tendencies when my BP isn't under control. Skully is also correct that it could be a reaction to meds. When did you notice it starting? I know school has been stressful lately, so do you find it increases when stress increases? If you have a therapist I would suggest speaking to him/her about it.