Why do i have dizziness shortness of breath headaches and palpitation with hb of 11.5, 4 days after heavy periods while other people show no symptoms?

Dizziness: You obviously had blood work to determine that your hemoglobin was good i would make sure that you are well hydrated and eat plenty of green leafy vegetables to make sure it is not a nutritional issue. If this does not work have an ENT check you or a neurologist. I know the ENT can do balance tests to further check this. Good luck!