Back in 2017 for the bitcoin cash fork I had bitcoin on a Mycellium HD wallet. Initially I tried to sweep my funds into Coinomi it didn't load the total amount of bitcoin cash it should have. (It only showed ~25% as much as I had.) I gave up on trying to recover the rest until recently I was in my mycellium wallet and noticed there is an "unspent outputs" section (it's easy to brush over; you have to select your HD wallet and then click the three dots on the top right corner.) which lists four or five unspent outputs. So I guess when I sweeped my wallet into coinomi it only sweeped one of the unspent outputs. I have now been reading some tutorials on how I can recover the rest of my BCH into coinomi (or another wallet) using bip32.org:

https://bitcoin.stackexchange.com/questions/57422/how-to-sweep-private-extended-key-from-mycellium-for-bitcoin-cash-coins 

I'm confused on exactly what information I need to enter on bip32.org. Before I started entering sensitive information to bip32 I transferred my bitcoin to a new wallet but now as a result I can no longer see my unspent outputs in mycellium.

Can anyone walk me through what exactly I need to do to recover my BCH, or am I shit out of luck without knowing what my unspent outputs are?

When I open the "export account keys" menu in Mycellium it lists a public key (xpub, ypud, or zpub) which are 112 character phrases and a private key (xprv, yprv, zprv) which are QR codes.

I understand HD wallets like mycellium are a bit more technical and though I've owned bitcoin for some years I just hold it and dont really move it around much so it's all still pretty new to me. Any help is appreciated. 

It's from 2016.

I dont know if it is encrypted or not lol. Sorry it was from years ago.

It was on an old USB drive.

Yeah, that looks to be the case because it's saying the same thing. Oh well. Thanks for your help.

Sorry for delayed response. I am running pywallet on a copy of the wallet.dat that I already attempted to -salvage.

When I initially found the bitcoin wallet dat file I made a copy of it which is the copy I've been working on.

I ran the second command (without the passphrase line, due to not knowing what the password is.) In the command window it outputted an "error: unpack_from requires a buffer of at least 4 bytes", and above that it outputted four lines all starting with "File "pywallet.py, line xxxx," the x's being numbers. Looks normal I imagine but just throwing it in here anyway (because I have no idea  )

When I open the wallet.text file it reads:
"ERROR parsing wallet.dat, type tx"
"Key data: *random characters*"
"Key data in hex:"
*a bunch of numbers and letters*
"value data in hex:"
*a ton more numbers and letters*

Yes, my wallet.dat is in my pywallet folder and is labeled "wallet.dat"
I'll try that now with ecdsa.

BTW I've tried using the datadir command but pywallet says it's been removed:
REMOVED OPTION: put full path in the --wallet option
  -w WALLETFILE, --wallet=WALLETFILE
                        wallet filename (defaults to wallet.dat)

And also I dont know the passphrase to the wallet. It's 6 years old or so. It appears to be encrypted basing off all the characters and symbols when I open it in notepad.

Ah, thanks for that. That did the job. However, it still says the wallet is corrupted. I was trying to use pywallet but I've been getting an " 'ecdsa' package is not installed, pywallet won't be able to sign/verify messages       A mandatory option is missing "  I tried installing ecdsa but wasnt sure where to install it, into the python27 folder or program files etc and what exactly I need to do to get it working with python. (I dont know much about python.)

What I'm typing in in the command window is: "python pywallet.py –dumpwallet > wallet.text --passphrase= PASSPHRASE".

Also, I get an "error: no such option: -u" in the command window" unless I change the "-dumpwallet" to "--dumpwallet", so Im not sure if that's a mistake on the part of the website where I copied the python code from or what.  And finally, it says "pycrypto or libssl not found, decryption may be slow" but Im not sure that's even a problem.

I have an old bitcion wallet dat file. Bitcoin core says it is corrupted. I followed some tutorials online to try using the salvage command but when bitcoin core starts up I get hit with a "Error parsing command line arguments: Invalid parameter -salvagewallet."

I'm typing in cd C:\ProgramFiles\Bitcoin\bitcoinqt.exe -salvagewallet to an elevated command prompt

I've tried it both on Win10 and Win7.