Is it normal to think a lot when feeling sick?

earlier today i was really sick. i had nausea, dizzy/lightheaded, confused kind of, and shaking. i think i was really dehydrated but i was near the toilet feeling like to throw up and im just sitting on the floor spaced out. i thought about like having kids and stuff but i didnt want them to go through this or something. when i came back to reality i was confused and asked myself why was i thinking about that. i think i was tripping like seeing little stuff that never existed. later on i took a nap and had such a realistic dream. anyone else experience this?