Products not showing up on Shop Page. Help!!

I don't know what happened but all of a sudden my products are not showing on the shop page. can anyone help me figure this out??

ref: http://drshawnadarou.com/?post_type=product

also, if i search for a product name, it doesn't show up, even though i have a product page for it.

Ok, I figured this out and will post it for others to see.

I had to do a "Bulk Edit" of all my product pages and re-select "page type" to "products" in every instance. I also selected "Published" and "Visible". After doing this all my products became visible again.