Before I got to the end of your post I thought 'You sound like you have heightened sensitivity'. You led me to research a little on 'sensitive nervous system'. It was quite an education, so I thank you for the prompt. Must admit, I do have a passion for wondering about things.
It's pretty trippy when we can sense our own insides working, like when you can actually feel your own nervous system giving off vibes. It reminds me of how normally we can't feel our heart working until we become anxious enough to actually feel our heart thumping in our chest. This heart sensation can also come after a vigorous cardio workout. In these cases, it takes a lot of stimulation to feel our heart working. Typically, we don't take much notice of this incredible organ.
Myself, I actually work on ramping up my awareness as to why I'm feeling what I'm feeling. I actually look to certain sensations. While, on the medical side of things, what I look for would be labelled as symptoms, on the natural side of things they're basically messages/cues my body's giving me. Example: Feeling pressure in my head (headache) will either be my cue to drink more water or else it will be telling me I'm spending too much time in my head (overthinking, wondering and so on), often a cue to become more physically active.
I'll look to my nervous system for certain cues. I know this is going to sound pretty weird but I start each day meditating on my feet. I'll sit then stretch them and roll them 'round and plant them on the ground and wait until I can feel a buzzing sensation. If one of my toes might be a bit numb, I'll wriggle and flex my toes until the numbness goes away. This is a great way to help with blood circulation too.
I suppose the question is 'Why are you feeling your nervous system?' Two ideas come to mind
- Maybe the old meds had numbed it a bit and now you're off them you're feeling your system come back to life or
- It's hyperactive and calling for closer attention which would be the field of a neurologist
Would be interesting to know whether you've become more sensitive in other ways. With heightened sensitivity taste, touch, sound, smell and sight can become different experiences. For me, it's certain sounds. Especially not so good with crowded places. Too many sounds all at once can hype up my nervous system to the point of physical discomfort.
I wish you all the best on your search for answers. Take care :)