Weak and tired

Je

For about three weeks I had awful morning sickness all day. The nausea wouldn’t go away so I laid low for a long time. Literally was in bed for three weeks all day everyday. It’s finally subsided a bit with ginger tea and vitamin B6 and unisom that I take at night but today I feel super weak and run down, almost light headed. Just wondering if you guys think this is normal. I’m 8 weeks exactly today