Thyroid removal side effects and does calcium have side effects?

Levothyroxine. If only a part of the thyroid gland was removed then unlikely to see side effects. If entire gland removed you will need to be on thyroid replacement therapy = levothyroxine. You shouldn't have any issues with calium.
Should resolve. After thyroid surgery you can shock your Parathyroid glands which may cause a short period of hypocalcemia. This can be treated with calcium carbinate (tums) or dairy products like milk. There is a minimum risk of taking ca.The transient hypocalcemia should resolve once the parathyroid glands recover,UNLESS they were mistakenly removed.You should also get your calcium levels checked by a doctor.