First pregnancy

I’m just curious, I’ve been extremely exhausted, consistent headaches off and on , slight stomach pains , and nausea but no throwing up . Is it normal to just have nausea and not throw up ?? Also was told the more tired you are the healthier the baby is . Also I’m having a hard time eating properly I’ve been eating whatever I want but also majority of the time I have to force myself to eat bc I don’t have a appetite…are these normal? I know everyone’s pregnancy is different.