Unfortunately I only have backups on an old pc which i had to uninstall and then re-install itunes onto and although I can click in restore from backup and choose one from may and june I get a message saying that it could not restore because the backup could not be saved on the computer ?
I did not ever sync my accounts with google or ical as i am not familiar with them really.
Is my only option to restore back to 4.3.5 to get everything back ?
Well ... maybe, but that's a terrible option. Lots of issues getting the data off then back on a 4.3.3.
I wouldn't do it unless you have experience. PKGBackup could help out, but it's a bit complicated with it's many options and capabilities.