I second all of brodiejlb's wise points above, especially 'just do it' (and keep at it), and point 2).
When you say...
Avalon:
I want to keep contributing to the library and express myself but it has just been very difficult to produce anything of worth recently.
...the phrase 'anything of worth' jumps out, grabs my throat and shakes my head so violently I can't think.

But whose definition of 'worth' is it? Yours, or that of a putative reader scorning your stuff? And is there any difference?
For me, it's very demotivating to find what I've written is c**p - it makes me reluctant to even begin to think about contemplating getting ready to tentatively approach the idea of trying maybe to consider writing anything else... ever.
But that excremental judgment isn't always accurate - sometimes a later re-reading, preferably after a glass of wine, brings a different view (even if some bits do need editing).
Try approaching your keyboard in a forgiving mood. Be kind to yourself - your kindness will be repaid.
