I often find myself clenching my hand/legs/ teeth infact the whole body. Even when I wake up I realise i was sleeping with my face and hands clenched and teeth grinding Into one another. At times I even feel my nerves are throbing and vibrating really hard. This never used to happen before. Im suffering  major anxiety issues also so I'm not sure why my nerves are acting up. and ive seen a few doctors but none could identify the problem to my satisfaction. Itll be helpful to gain a bit of clarity on what kind of doctor should I visit and if this is a physiological or neurological issue