The frustrating thing is that twitches and short stabbing pains can actually be symptoms of recovery from B6 toxicity - or at least they definitely were for me. I had numbness as the main symptom of toxicity, and pain as the main symptom of recovery. Bizarre, eh?
Sadly, I'm starting to learn that a lot of doctors and health specialists don't know anything about this. I recently saw an acupuncturist (that makes her my 21st health care specialist that I've gone to seeking help for my B6 Toxicity). She started trying to get me to eat a "healthy" diet. But most of the foods are high in B6. So I'm in even more pain now than I was before I saw her.
My recommendation to you would be to keep a log of foods that you eat. Eat something that's separate, not mixed with other foods, so you can figure out what bothers you. I've found that drinks, carbs and vegetables take about 5-15 minutes to start causing me pain. Protein like salmon, tuna and pork give me pain about 45 minutes after I eat them.
Once you know which things are bothering you, you can look online and find out if those foods are high in B6. That will give you a better idea as to if you have B6 toxicity or not.
I find that the craziest things have B6 in them. Like soy lecithin which is a filler in a ton of American foods: oreos, M&Ms, Hershey's chocolate. I thought that avoiding only bananas, flax and potatoes would keep the pain away but there's B6 hidden in many things.