Upgraded to kitkat and appeared to have lost lots of data including backups

Hi guys please help.

I upgraded from 4.1.2 to kitkat neatrom based on slimrom.

I was going to do new nandroid backup, wiped my 2 newest to make space and then was going to do a nandroid backup but forgot as was distracted. Installed the new rom, I was aware of the new naming scheme for the fodlers and assumed it would be automatically handled or at least my data still accessible in old folders.

It seems the following has happened.

All my titanium backups wiped.
contacts/sms/call log backup data etc. wiped
Any existing files, including photos etc. in data dir wiped.

is this a known problem?

or is it not wiped and they got moved somewhere?

I have not lost everything still have some nandroid backups but none now that recent. I take blame for forgetting to do the nandroid backup but I am hoping is at least a way to recover the data that was on my sdcard.

further information.

some data is intact for example I have recording from easy voice recorder pro, yet other folders like pictures, titanium backup, ringtones all old data is gone.