Physically draining pregnancy

This is my second pregnancy so I know that pregnancy in general is tiring but I’m struggling to get through normal everyday activities.

Being on my feet is incredibly difficult, I can hardly breath, I get light headed quickly and my stomach goes rock solid. I’m so physically tired I barely have enough energy to cook dinner at night, even just putting food into the oven seems too much for me. Is anyone else having/has had this much trouble in pregnancy? I don’t know how I’m going to make it another 11 weeks