If you take calcium supplements for a long time but never more than the amount suggested, is there much risk of having too high a calcium count in your body?
No symptoms but have stopped taking them after reading about kidney stones & plaque on the arteries.

Your body has a high requirement for calcium, and if you are taking no more than the RDA, then you should have no problems.

I would suggest that you take your calcium along with some magnesium. The bones are about 2/3 calcium and 1/3 magnesium. If you don't have enough magnesium, then your body can't use the extra calcium properly. A little vitamin D is a good addition.

Just to add... some people are more prone to kidney stones, but making sure you have an adequate fluid intake can help tremendously. You may even find you need to make a conscious effort to increase your intake.