Hi. Please help! I sent some btc from an online wallet to my Electrum wallet, but before I got a chance to notice my new receiving address I put in the old address. Now I have my transaction in pending in my online wallet and it's not reaching my Electrum. I've been reading some stuff, but not sure what I can do.. Please help a newbie! Thanks
Don't panic. Everything will be fine.
Electrum automatically uses a new "receive" address when the previous one has been used in an effort to help users prevent "
address re-use"... However, all the previous addresses are still contained within the wallet and can still be used.
I suspect the only reason your transaction is "pending" and not confirmed is that the network has been very busy with the Bitcoin Gold "snapshot" being taken today... and everyone moving coins around. There are 25,000+ unconfirmed transactions in the mempool and have been over 30K today because of this fork.
Just wait, or push your transaction with a transaction accelerator like ViaBTC or confirmtx.com... Your coins will show up eventually