Feeling off 😕

My son is 8.5 months. Breast fed since day one. He's been nursing a lot the past few days. I assume he's getting ready for a growth spurt. I'm starting to feel really weird. I've been shaky, nauseous and dizzy. I'm starting to get pretty tender from all the nursing also. I've increased my food and water intake. I make myself eat and drink even though I don't feel like it. But I can't shake this feeling. Any one feel like this when their baby nurses a lot? I just feel so drained.