Yeah, what you can do now is, after you turn tinyumbrella on, try to put your phone in DFU mode. Press and hold the power and home button together for 10 seconds until you hear a voice that is like when you remove a USB device from your computer, now release the power button but continue holding the home button, you will hear a sound like you have inserted a USB device to your computer, if it doesnt show in tinyumbrella, just disconnect and reconnect your iphone, click on exit recovery, and if it goes into infinite loop, put your phone back in DFU mode and click on fix recovery, if this doesnt work too, i think fix recovery is the best.
Fix recovery steps :
Download fix recovery and zlib1.dll. Save them in the same folder.
Open command prompt (cmd).
In the command prompt navigate to the folder where fix recovery is saved and run it ( C:\>fixrecovery ).
Everything else will be taken care of by it.
Put your phone in DFU mode before you start fix recovery, even if you forget dont worry about it, as fix recovery will prompt you to put the phone in DFU and wait until you do so and then continue
Hope i helped...:)