I think I am dying

I really think that something is wrong with me because every time I lift I get really tired and feel like I am going to throw up/pass out. My theory is that I either am defficient is a certain type of vitamin or I have too much of one. I am re-evaluating my diet and noticed that I eat basically the same thing every day so that could be the problem. The other thing is I might have the flu and just don't have the cold/cough symptoms. Or I might have cancer or diabetes. But anyways I did abs then lifted. For lifting I did 3 sets of 10 @ 55 pound dumbbells flat bench press, then 2 sets of as many pull ups I could do ( 7 and 5), then 2 sets of 10 @ 35 pound dumbbells military shoulder press, 2 sets of 10 @ 65 pound barbbell bicep curls, 2 sets of 10 @ 125 pounds and 1 set of 10 @ 115 pounds tricep pull downs, and finally 1 set of 10 @ 50 pound dumbbell one armed flat bench rows.