Default [Q] Note 3 random vibrations

My note 3 is an international ver. N900.For about two days I've been facing a weird problem,the phone would vibrate 3-4 time(long vibrations) in a row randomly without giving any notifications.I've been using Dr. Ketan's rom for around 10 days and didn't face any issues until last two days.The phone would vibrate when I'm playing games,browsing web...anything,sometime it does so even when in sleep mode.
Searched the web and got some solutions like update samsung account but it didn't work.So can someone help me with this issue?

Thank you.

Current Phone:Galaxy Note II
Android Version:4.4.2
Kernel version:Stock
Rom:DN3
Recovery:Philz Touch Recovery

Current Tablet:Samsung Tab 2 P3100
Android Version:4.2.2
Rom:Adis Sungsonic HD
Kernel version:Stock
Recovery:Philz Touch Recovery