can't find most recently uploaded photos
I recently got a new iMac and had to try and switch over to photos from iPhoto. I upload photos, edit them and then I can't find them ANYWHERE when I need to upload them online. I tried making a new folder for them, but then that folder can't be found either. I try making a new file of the image in photoshop, but I can't find the image to open it.
I'm not sure at what point they finally becomes available (a day or two later?), but closing and reopening photos doesn't help, and it doesn't even show up in "last download" when I try to find them (though they do show up in photos).
iMac, OS X Yosemite (10.10.3)