OMG! Thank you! Now I know what to do. I thought my beatmap was lost and that I have to make a new one.
Edit: And now I have a new problem. The file is now a .osu instead of .osz and I didn't touch it at all. And I tried adding .osz at the end and that just made the file name have .osz tacked on. I can't even open up the beatmap to troubleshoot. If anyone can help please do!
Edit 2: NVM I just didn't see it on the ingame beatmap list but it was there.