Experiencing shooting pains in foot/toe/calf sudden and acute..

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These are really painful and sudden, and I have felt these twice now. (in different weeks) First, I found my left big toe nail had slowly thickened over time,
and I started applying toe nail fugal ointments to cure. It started to look better, and easier to trim, though not totally. Then I started getting these very painful and sudden jolts in my leg and foot, and it happening suddenly.
It seemed to pass, until three nights ago, I thought I had stepped on a thorn from picking berries outside, and it was later that evening these sudden pains and jolts came on once again, and I was in tears. Looking at my big toe the
next day, seems the nail is yellowed and some brown, cracked and layered.
There was also throbbing and pulsating pain in and around my big toe area.

Can anyone tell me what is going on, and what this may be? I've yet to see
my doctor, but will get there soon. Thanks for any suggestions or thoughts.

I recently had some blood tests done, (though this was before these pain episodes) and
the doctor said that I had low vitamin D level, and that was it. Would these
tests have shown any problems concerning diabetes or gout?

Thank you again for any suggestions.... and what is this horrible pain?