Hello There, I Am 56 Yrs Old And I Still

Hello there, i am 56 yrs old and i Still try an run a couple of times a week, but not far now as i am increasingly finding that it makes me feel ill, after about 15-20 mins of a gentle run i start getting light headed and feel a little unsteady on my feet and need to stop as i start to feel nauseus and have a cold sweat. I continue to feel unwell for several hours afterwards.