My leg burned and was angry from the lead ball that was lodged in it just above my knee. I felt sleepy and everything would go black. Then I'd wake up again. I wanted to go back to our farm in Ohio and sometimes, When I'd fall into one of them strange sleeps, I'd be there with my Ma, tastin' baking powder biscuits fresh out of her wood stove.
In that paragraph does "would" stand as conditional or future in the past or something the character did many times I think the third answer is the good one.