Extreme fatigue and faint feeling.

Im 35+3 has anyone experienced extreme fatigue, shortness of breath, and faint feeling when trying to do anything? This is my first pregnancy and i understand that things get hard to do and fatigue is emanate but if I get up and try to do any normal task such as standing at the stove or sink or even sitting to fold laundry in 2 to 3 minutes my heart starts to race, I get short of breath and if i dont sit down immediately im sure i would pass out. No way this is normal?? The only thing i can compare the feeling to is heat exhaustion.