Battling sickness and fatigue

Sammie

Boy am I suffering this time round!!! I am 13 weeks 1 day with my second child and I'm really suffering. I'm so so tired, I'm breathless and my nausea is so bad I need medication. How do you guys cope? Maybe I need to start doing some yoga and eating a bit healthier? I struggle to even eat toast and walk but could this be what I need? Anyone else in the same boat?