Help IPHONE CONTACTS DISAPPEARED

I have an iphone 4 on 5.1 ios. - i have had ZERO problems with all my phones until today.
its jailbroken(note: i'm very technical and stuff so i know this isn't the issue).

i have never synced it to icloud, only ever manually managed music and have only ever used 'backup' for contacts, messages and stuff. The last backup was on 23rd feb 2013.

so it was about 4pm this afternoon i was leaving work, tried to open a text msg, but every time i tried the text msg app wouldn't open. It would just go back to home screen. So i restarted my springboard(jailbrake term) and went into msg's and noticed my the texts were from unknown numbers. I rebooted the whole phone and then went into contacts and noticed THEY WERE All GONE! After another 2 reboots no change.

i know i can restore from my last backup however i have put new contacts and such in the phone. Is there anyway i can just restore my phone without losing new data.

Please DO NOT TELL ME THIS HAS GOT DO WITH JAILBREAKING.

Added (1). NOTE: over MANY years now i have had different devices All jailbroken done myself. No issues whatsoever. Not slow, no turning on and off issues. All devices run as gold.

Added (2). NOTE: over MANY years now i have had different devices All jailbroken done myself. No issues whatsoever. Not slow, no turning on and off issues. All devices run as gold.

Added (3). NOTE: over MANY years now i have had different devices All jailbroken done myself. No issues whatsoever. Not slow, no turning on and off issues. All devices run as gold.

It doesn't matter what you have done "over MANY years"… Blah blah blah. That doesn't mean you don't have a problem with it.

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