IOS7 deleted everything, what now?

So I had updated my IPhone 4 from ios 6.1 to ios 7.0

After Itunes automatically backed it up, and the phone was reset and the backup restored, none of my applications are there. Its been an hour and none of them showed up. All of the data (messages, photos) appeared but all of my apps and app data was deleted.
I have a backup from 1 month ago but when I try to restore the backup, it says that there's not enough space avaliable. The backup has too much space or the Iphone? What do i do now? Do i reset my phone then back it up, or should I just downgrade it?

(It was jailbroken too, but I don't care about the jailbroken stuff.)

Added (1). As it turns out, everything is still on my Iphone, it just turns out, that I had none of the apps on my phone in my Itunes library and as a result, the apps didn't automatically sync in.

Https://www.facebook.com/pages/iHate-iOS-7/168359436686394

Downgrade to iOS 6.1.3 is easy!
Find the firmware that suites your device.
Re-install your iTunes with the older version.
Delete all the iTunes library.
Set your device in the recovery mode.
Open the iTunes and shift-click restore button for your device.
Wait until it finished!

Leave the message here in case you have other problems!
Thanks for reading!

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Hope it helps!