Have you ever look at the mirror and see that your face is not really your face? Like facial features are the same, but you don't feel like you is really you. Sounds weird but I've experienced it many times. Is that OCD thing or something different? 

Do You Feel Like Yourself Has Changed? | Don't Feel Like You Is Really You

Sounds like dpdr, google it to see if it fits u

I experience this a lot. Like I KNOW it's me, but there's something off and I can't put my finger on it so it doesn't really look like me. Look up depersonalization and derealization. It can't hurt you and it's very distressing but it's just your brain protecting itself from all of the anxiety it's experiencing. 

Yes! I have experienced that before. I would look in the mirror and say my name but it didn’t feel like it was me in the reflection!

I have also thought this, not so much in an obsessive or worrisome way, but just zoning out staring at myself haha. It is interesting to think that we can only see ourselves as a reflection and never as others see us. 