i think you are correct in that any head ache isn’t a relapse etc., as it may be due to anxiety and lack of decent sleep.
the pains you feel in the leg are quite familiar to me. i have perhaps been very fortunate as they have never really been so severe as to interrupt my slumber; although sometimes, they can be annoying and noticeable in the middle of the night.
as far as mix of symptoms goes… that is kind of what MS is all about; it almost always gives you stuff, which when you try to describe it, you sound demented!
the thing i get (and was getting long before any diagnosis) is what’s succinctly described as a ‘hot sock’. just on my right leg… from toe to just below the knee; some times all encompassing, sometimes just the ankle, sometimes just the calf, sometimes just the shin. could be described as tingly (as per pins and needles) but usually just pure fire. but then sometimes, it is more like icy cold. like when you touch something which is frozen but feels as if it burns.
now i sound demented
like you, there is no actual temperature difference when touching the bloody thing. and there is no discolouration of the skin either, and so i quickly discounted the fear of circulation being a problem. the strange thing is, whilst putting something cool on it, like an ice pack does nothing; putting a sock on actually seems to help somewhat.
nowadays i sometimes get it following a dose of good exercise; like a tip top game of hockey. i never really took it as an indication of a relapse (strictly speaking) but just one of those occasional things which needed to be endured. if i were you, i would keep a diary; just document what it is, where it spreads to / retreats from, when it gets uber hot / cold etc… if you end up recording something that progressively gets worse, you might be inclined to conclude a relapse has begun.
in any event, do whatever it takes to get your hours of sleep back to where they need to be. if this means a litre of vino collapso and a few jazz cigarettes… well then get to it!
good luck and try not to worry!