Hi Thephoenix,
I can understand the stress this would have on you and in itself cause anxiety.
You have to consider all possibilities but the easiest first.
Are you on or recently started any medication?
How long since this started?
Anxiety can cause twitches and many other problems but less likely in familiar surroundings or with close family.

A problem like this will make you feel anxious and very self conscious possibly making the complaint worse. As the problem is on going you really need to see a doctor asap, they will do a blood workup checking thyroid functions,calcium levels etc.
Luck to you
Nick