do you feel that ethereum is very slow now? only sending ethereum with gwei 11 and gas limit 21000, in the calculator at ether gastation takes 40 seconds. However, until now (2 hours) it has not been pending, and even my previous shipment has experienced the same thing (five days still pending)
do you think it's only for a moment or did I make a mistake?
Any of the two could have caused it and you have to thoroughly investigate the transaction to be sure that you are not the one that made a mistake because this has never happened to me before. In every of my Ethereum transaction, the highest it has ever delayed is 30 minutes, it is only bitcoin delays that I am used to because that one could even take a whole day sometimes depending on the network traffic, but for Ethereum, I think this is quite usually, especially that one that has been hanging for 5 good days.
You can still be patient for another 2 days more to make it a week before you conclude something is wrong from your own end which I believe that you will find solution to since the transaction is done over Ethereum network.