I sent a transaction with way too low of a fee on accident. It has been sitting for about 48 hours now on unconfirmed, is it normal for a transaction to be dropped after 72 hours or is this thing just going to sit there for a week or more? I have tried a few double spending methods that haven't seemed to work for me, not sure what else to do to get these damn coins out of limbo.
72 hours it should drop from mempool
you said you tried many double spend methods, was RBF (replace by fee) one of them??
try the tx boost viabtc