I was making real progress on my research paper...

I was making real progress on my research paper for English and my power just went out. It came back on, but my computer won't. It says "disk read error." I am so scared that my computer is fried and that I've lost the last 4 hours of work. I just feel like crying. 🙁

Kind of afraid to try to troubleshoot the PC - the power is flickering. I am so distraught.