Everytime I exercise I get extremely nauseous and my throat starts to hurt. It doesn't matter if its 5 min or an hour. What could this be?

Adrenal insufficent. Get a saliva test to measure your adrenals, samples from morning, noon, before dinner and before bed, to measure cortisol, dhea. Most likely your adrenals are spent, and pushing them further with exercise creates inflammatory response, in your case in your stomach, which according to chinese acupuncture connects directly with the throat. Seek help through functional medicine and five element acupu.