Hi.

This is the warning that blackmores gives regarding B6 toxicity:

WARNING: This product contains pyridoxine hydrochloride, which may be dangerous when used in large amounts or for a long time. Pyridoxine-induced peripheral neuropathy is most commonly reported with doses of 1 g or more daily, taken for 2 months to 3 years
1g = 1000mg = 1,000,000mcg

So it looks to me like the doseage you are taking is well under this amount.

As far as LP - 10-16 days is considered "normal" but 12 or more is apparently more ideal.