2) "da man bei bitcoincore ja nur einen halen bei der gebühr setzen muss, sollte die ja auch nicht das problem sein" - False assumption that any kind of fee is adequate to get a confirmation.
3) Without knowing the transaction size, thus not being able to calculate your satoshis/byte fee-rate, I'm still going to say that it will never get confirmed with a 0.00003840 BTC fee. The average fees are in the range of >$2.
4) Use this website for fee calculation: https://bitcoinfees.21.co/
5) Try contacting this user: https://bitcointalksearch.org/topic/free-help-with-your-stuck-transaction-1943939