I no longer have muscle problems and they went away because of this: I had thyroid troubles!!! It was the cause of my candida infection!!! My body temp was always below normal which tipped off my doctor. When the thyroid doesn't work properly (hypothyroid in my case, meaning it was sluggish) it gives one constipation and other gut problems that can cause the candida to grow and prosper.

It is very common to have thyroid problems as you approach your 30's because your estrogen output goes up with decreased ovarian reserves (less eggs) and estrogen tends to depress the thyroid function.

It may be worth going to your General Practitioner or seeing an Endocrinologist about it.

I hope that helps you out. It took me about 3 months of taking the synthroid for my muscle aches and other related fungal problems to virtually disappear. I get a few muscle cramps as my period approaches and I will help support my thyroid with multi B vitamins and a kelp pill daily.