Here is some accurate information from a particular study about what is most probably happening with the information you have provided:

I’m really sorry you’ve been going through all of this — especially after already dealing with a staph infection and years of symptoms that must have been frightening and frustrating. What you described with the B6 toxicity is very real; B6-related nerve irritation can cause many of the symptoms you mentioned (tingling, burning, clumsiness, visual disturbances, tremor, “hot feet,” etc.), and unfortunately it can take months for the excess B6 to clear from the system and for the nerves to calm down.

What’s tricky is that once you stopped the magnesium supplement (which contained the B6), the original issue—nighttime cramps—came right back. Even with “normal” magnesium on blood tests, people can still get cramps because blood levels don’t always reflect what’s happening inside the muscles.

A few things that people with similar experiences have found helpful:

1. Try a magnesium form that contains no B6.
Some tolerate magnesium glycinate or magnesium citrate without any B6 added. Even 100–200 mg before bed can help if your body responds to magnesium.

2. Check ferritin (iron stores)
Not just hemoglobin. Low-normal ferritin can trigger severe nighttime cramps and restless legs–type symptoms.

3. Peripheral nerve irritation from the old B6 toxicity:

Even though your levels are dropping, irritated nerves can cause the muscles to “misfire” at night. That can take 3–12+ months to settle. Some people do physical therapy or gentle nerve-gliding exercises and notice improvement.

4. Try non-drug physical measures that help some people with stubborn cramps:

• Warm foot bath before bed.
• Heating pad to calves/feet.
• Gentle calf and hamstring stretching.
• Massage or foam rolling.
• Wearing loose socks (helps some by reducing nerve irritability).
• Trying a topical magnesium (no B6).

5. Ask the doctor about prescription options for severe nighttime cramps
If it is disrupting sleep every night, some physicians consider:

• Gabapentin or pregabalin (for nerve hypersensitivity after B6 toxicity).
• Quinine alternatives (quinine itself is rarely used now).*
• Low-dose muscle relaxants at bedtime.
These are not for everyone, but you don’t have to suffer night after night.

6. Consider getting an EMG/nerve conduction study.
Since you had real B6 toxicity and ongoing neurological symptoms, testing can help confirm whether the nerves are still irritated and guide treatment.

You are not imagining this, and you're not alone — B6 toxicity can absolutely cause lingering neurological effects that make cramping much worse, even long after you stop it. The good news is that many people do improve over time once levels normalize, but it can be slow and they sometimes need help managing symptoms during recovery.

I really hope you get some relief soon. You’ve been dealing with more than enough.