I Have Had Surgery On My Para Thyroid Cause My

I have had surgery on my para thyroid cause my calcium levels were high. It has taken awhile for the levels to drop but @ Times it may still run a half to a point high. I watch my calcium intake as much as possible. Anything that u can suggest? Also,I don't take any vitamins &sometimes don't eat enough fruits & veggies. What do I need to do? And what about taking magnesium? I so appreciate your help . THANK You!!!!! PATTY