Are there any side effects from taking too much calcium? Wuld it cause any swelling in my legs?

Yes. High calcium levels in the blood lead to a condition known as hypercalcemia, which can have many causes, including calcium overdose. It's not likely that anyone would overdose on calcium from natural food sources, but an overdose of calcium supplements, or other supplements such as vitamin d that increase calcium absorption in the body.High blood levels of calcium can result in many problems.