Re: fluttering or bubbling feeling in legs
Sounds like Restless Leg Syndrome to me. It's very common in anxiety sufferers and usually can be described as a constant desire to move legs due to buzzing, tingling or other nervous feelings in the legs. From my experience of it it is most common at night. As soon as I lie down in bed it starts and keeps me awake.
Nothing really to worry about - it will suddenly stop as inexplicably as it started.