You can still push the first transaction: fdd0183cd66ed4aa96b6f0658d84c149a753641b63d7eb19cb7f70ed3c2fbf92 via
https://pushtx.btc.com/ by paying them a fee of $21.75 (if it's feasible for you and it's urgent) and this way, both your transactions will confirm. Else, you will need to wait for the first transaction to be dropped from your network and try again sending just 0.14028 BTC to the address.
You pay pay btc.com with your VISA card, so that gets round your problem of having no confirmed bitcoins left to pay quickseller or macbook-air.
You insert your transaction and then click 'ESTIMATE PRICE', then you can pay with your VISA card so you can spend your bitcoin, the irony is unbelievable...
Quickseller was really nice and pushed my transaction without paying him upfront without questions (I'll pay him once the transaction confirms).
So, if I understood everything correctly then it's still possible that I have lost my money and my bitcoins will remain stuck in the middle of nowhere!? I'm not panicking but I'd like to know the worst case scenario! Is there any way to be able to get my bitcoins back?
No, it's not possible you have lost your money. Even if your transaction never confirms it doesn't get lost, the network eventually forgets unconfirmed transactions, and your Bitcoins reappear in the address you sent them from.
If quickseller's agreed to push your transaction I don't think you'll have long to wait for a confirmation. He got ahmedjadoon's transaction confirmed very quickly. You will only have a long wait if F2pool doesn't mine a block for hours.
I faced a similar issue a few days back transaction not getting confirmed due to low fee but user "QuickSeller" got my transaction confirmed in minutes when I sent him 0.0001 BTC. He has access to some pool . PM him.
Quickseller will push your transaction using F2pool, so when it mines another block your transaction will probably get confirmed. You can see the times it mined its latest blocks here.
https://blockchain.info/blocks/F2PoolSo basically the best I can do is to add the receiving address to my blockchain.info account's watchlist and wait till I get the notification email.