Sick hamster please help!

Hi everyone. My baby, Pickle, has been declining a bit over the last few weeks. It just started out as having less energy and sleeping more but over the weekend she only woke up once, barely ate and stopped drinking. I've been droppering water to her and feeding her little pieces of egg white. She's shaky, slightly cool and disoriented. She doesn't appear to have wet tail but is very weak and keeps her eyes half shut.

I adopted her because she was abandoned in a park and a friend found her. I had no idea about her past or how old she was. From the reading I've done it seems like maybe this is what happens with old age but I hate seeing her suffer. There arent any vets I can access in my area that treat hamsters. Any advice would be helpful! Has anyone gone through this? I can't stop crying.