urgent

After staying up late many nights, for countless days, and after putting my heart and soul into this map, it comes up with an error. I can't load it, and me being stupid i forgot to enable autosaves. I need help, I'm afraid of losing all of my hard work.

somehow, I deleted my Map View tools, and I have no idea of how to get them back. I've looked the issue up on the Valve Developer Community, but the best that website gave me was "The Hammer toolbars can be removed, repositioned, and docked to help you create a layout that will work for you."...

I am just about finished with my map, and ever since I added a small boss fight to my map, I get this error. I already deleted multiple areas to my dungeon. I don't even have that many props.. I read that light spots can cause this but I don't even have that many light spots compared to my other...