Trouble converting/sending xDai back to ETH

I need some help to hopefully recover some xDaui. I was successfully able to convert ETH to xDai on Nitty Wallet. I was able to successfully transfer it to Metamask wallet. But when it came to convert it back, i missed something. I tried to export xDai to several addresses and while showing success they never arrived. I made an effort to transfer to my ETH address in Coinbase, and an Xdai address inside Coinbase wallet. Both show Success, but neither arrived. can someone help please.