It's extremely likely you are magnesium deficient as most people are. I would try and boost your magnesium in any case.

I read this today:
Magnesium rich foods such as bone broth, seaweed, leafy green vegetables, properly soaked seeds and nuts, unrefined sea salt and soaked or sprouted whole grains. And because Vitamin D, Vitamin B6 , Vitamin B12, and a little calcium are essential for magnesium absorption you’re going to want to eat foods that contain those nutrients, too.
The REAL Cause Of Morning Sickness « The Mommypotamus

Perhaps that's why when we introduced real salt in our salt (not refined sea salt) I went nuts on it... actually, 11 months later I'm still pretty nuts over it!