I had arthroscopic knee surgery to fix a lateral meniscus tear. but i was doing a squat and felt popping right there could i have torn my meniscus?

Yes: Yes, it is possible that you tore your meniscus again, particularly if it was not yet fully healed. There are other possibilities as well. I would certainly let your surgeon know.

How does it feel?: Go by your symptoms. How does it feel? Unless it's swollen, you have an effusion, mechanical symptoms like locking or catching and it's affecting your gait then just see how it evolves.