48 hours ago, I got a slight puncture by a rusty nail. I haven't had a tetanus shot in forever. Over the past 24 hours, I've been having muscle tics…in almost every location….arch of the foot, above the knee, arms and wrists, around the lips, the jaw, the neck, etc. Are muscle tics an early symptom of lockjaw? Or am I simply deficient in a mineral or something?

If you haven't had the ticks before, then I would go to your doctor immediately and get a tetanus shot.

If you don't go and you get through it or whatever – then go and get a tetanus shot for future references. It's a horrible infection.

absolutely yeah you should go to the doctor wright now

You couldn't possibly have tetanus symptoms in such a short time. I suggest the symptoms are due to something else, but having said that, you should see a nurse/doctor and let them decide what to do. As you have not got the tetanus shot before, my guess is that they will give it to you.