Missing layers in Adobe Animate?

I was working on a video for school and i recently saved it and opened again. But when i opened, I only see 2 layers of drawings ( i probably had more than 10). But when go to "Test" I can see all the progress I had made before ( the video is playing and the work I did before I closed and opened it again is still there) but I am unable to edit any of it as the layers that I was working on is not there.