From the research I've done in past topics regarding this - it seems to point to a webhost issue. I use Namecheap and they say that everything looks normal. I'm not sure what to investigate further?

My site is very quick when not logged in (like 80/100 on Google page speed... most optimizations have been taken).

When logged in, a page can take between 30 and 45 seconds to load and this includes entering edit mode, exiting edit mode, pushing any button whatsoever.

I've cleared all old page versions and have messed with cache - these little things don't seem to help at all.

Any suggestions?