Hi, I have been taking good health Mg Lax 2 in the morning and 2 at night for chronic constipation. I have been taking these for about a month with great results, but lately I have been feeling quite light headed dizzy and shakes, could this be an over load of magnesium. Ingredients on bottle say: magnesium oxide 400mg, magnesium sulphate 400mg,as orbit acid 50mg, sodium chloride 5mg, pyridoxine 2mg, potassium chloride 20 mg.Thanks