Editable access went away

Hello, 

I created an Adobe Spark photo essay in class about two months ago. I did this on my school Adobe account. However, now that I have feedback from my professor I tried to go back to edit the essay, but the project is no longer in my account. I have a link to the published project, but that will not allow me to edit either. The project is nowhere to be seen in my account despite it being there 1.5 months ago. Any suggestions as to where it might have gone? How can I find the project in order to edit it? Can I locate it based on the published view? Any feedback is appreciated! Thank you!!!