How to restore jailbroken iphone stuck in recovery mode without tunes?

I have a jailbroken iphone 4 running on ios 7.1.1. I checked cydia and updated a few tweaks and since that update, my tweak called "f.lux" wasn't working so i deleted it. After deleting it, i would swipe to unlock my home screen but my phone would just shut off and restart. Restoring it in itunes didn't work and errors would always pop up. I tried using tinyumbrella and it didn't work. I also tried downloading an ipsw file but that doesn't seem to work either. Do i just need to buy a new phone or is there a way of fixing it? PLEASE HELP!!!