A map issue with Forge

I created a map when Halo 4 first came out and I wanted to recreate the map in better detail, etc. So I loaded that map and deleted everything and started building fresh on that map within the last two days. I spent about 7 hours on it and would save as constantly as every 15 mins.
I placed a few too many items as I hit the budget limit and I decided to just exit the map and select it again in the forge lobby (as loading a map you just exited will still have previous items on it). I loaded the exact same map i was working on and there is nothing new on it since I created the map.
I thought I may have selected the wrong map so I checked the other 3 I have created and it doesn’t seem to exist. I check the map I know I recently modified. It is gone. I also checked the details of the map to see if its been modified and no, it only has the created and modified dates on it when i first created the map.
I have also checked temporary history and it does not exist there.

Is there anyway I can retrieve my map, or do I need to start over?

If you don’t save it, then it won’t be there when you exit.

But I did save it constantly, like every 15 mins. The only time I didn’t save was when I hit the budget limit and I saved bout 5 mins before that.