too small fee + overloaded blockchain = very long time to confimation

Options you can do:

1 - replace by fee (search for more info)
2 - child pays for parent (search for more info)
3 - trying some accelerator https://pool.viabtc.com/tools/txaccelerator/  or http://confirmtx.com/  (due to small fee i don't think that will work)