Pinterest Problems!!

Why won't Pinterest work properly (load, or "pin" things) on my MacBook Air??

It loads initially, but will not allow me to pin anything, or load any more pictures than the first 20 or so. It seems to be perpetually "loading" but never actually working. It used to work... why all of a sudden would it not work anymore? I have been trying for months. I have it saved as a bookmark on Chrome, have removed it and re-added it and nothing has changed. my accounts fine as it work on my phone but won't work on my Mac...