32 weeks and feeling very "off"

I'm 32 weeks into my pregnancy. For the last week I have been very tired, like first trimester tired, and just feeling sick. I have so much to do, but my body is so tired. It almost feels like the flu sometimes. I'm so sluggish. When I try to do stuff I get winded. It's frustrating me. I stayed home today to give myself down time. I slept, stayed on the couch, soaked on the tub, took a several hour nap. Got up hoping to clean but all I could do was sit there and feel sick. My body aches, I'm nauseous and gagging. No appetite. No desire to do a thing. I hate how useless I am. Is this normal for this stage, does it subside? I really need that nesting energy.