Thank you for the great support.
I installed this amazing plugin which help me a lot, in the end the problem was caused by WP-Sticky, I uninstalled the plugin (via the plugin dashboard cause the problem was cause in first place when I try to uninstall the plugin and delete the table via it admin interface).
The blog is working like a charm again, I lost some stats but nothing to care about it.
Again, thank you for the support.