i have so much energy but the dr wants me to limit myself cause of the dizzy spells and…

i have so much energy but the dr wants me to limit myself cause of the dizzy spells and fainting/blackout that has been happening to me. i hate having to limit myself cause at night i cant sleep and im up worrying and stressing out and then i start feeling antsy and my chest starts to tighten up and i get hot flashes and cant sleep. i just wish i wasn't so limited cause it stresses me out and worries me cause i still really don't have anything for the baby and our apartment is super super small. i just hate this so much.