I know it comes as a shock to you, but our Admin chscag warned against this and I posted in #4 what the consequences would be and I've given you 3 websites where this is discussed with potential solutions.
The problem is, as Bob said in post #7, you now have major permissions issues. That is; your original account in your name recognised you as the "owner" of all your data. When you created a new user, even though in exactly the same name, it will not recognise you as the "owner" of all your data - that is - it will most probably not give you permission to open/view what was formerly your own data.
We shall do all we can to help. Read my Links first, see if any of that makes sense. Whatever, we can work this out, but what you did, unfortunately, created this problem.
Just for info, do you still have the original Time Machine backup because, at worst, we could wipe out your Mac's Drive, reinstall the new OS and the copy over the data/settings etc from from you Time Machine.
Don't give up. We are here to help.
Ian