Why does it feel like my baby is trying to kill me?

Auburn

I'm 9 weeks pregnant and I've experienced nausea and vomiting since week 4! Now I am also experiencing constipation and diarrhea. I feel so tired all the time. I just want to know if there's a "happy" time in pregnancy where you don't feel like your thermally ill. lol. I need some encouragement. First pregnancy btw.