Hi and welcome,
To a Dr the term 'numbness' refers to partial or complete loss of sensation and is often accompanied by abnormal sensations, such as tingling. Many people mistakenly use the term numbness when they have abnormal sensations such as tingling, prickling, or a pins-and-needles sensation or when a limb feels weak or is paralyzed—perhaps partly because people with numbness often also have such abnormal sensations and symptoms. (see merck manuals)
I'm honestly not really sure what you are meaning when you say "asleep feeling without the tingling", the 'asleep' descriptive is usually how people describe a complete absence of sensation and or pins and needles, tingling etc and it's more commonly associated with restricted blood circulation or nerve compression situation in lower limbs eg entire leg, leg below knee, foot, ankle, toe(s) or upper limbs eg entire arm, arm below the elbow, wrist, hand, fingers.....
I just can't work out how a pattern of numbness in the "lower left leg, lower left arm, and face" that stops and starts at different times would follow known anatomical nerve distributions for a central nervous system neurological disease like MS, or even a specific structural issue to causes stress to the muscles or nerves in your spine in the same pattern.
I genuinely can't give you much information accept to advice you to consider this 'might' still all be anxiety and or accelerated breathing related because of the type of symptom pattern you've been experiencing, i hope you don't dismiss the potential of mental health with out seriously thinking about the possibility that you are dealing with a lot more stress and worry than your really acknowledging, and if there is some things going on, it just might change your tomorrows by talking to someone and learning how to cope with stress better.
I hope that helps a little......JJ