Is it bad to just be totally miserable?

Alyssa 🎀💜💕🌸 • I'm 22 & in love with my best friend and we are expecting a little bundle of joy 8/17!
And just want to cry all the time? I feel so guilty because I really feel like I hate being pregnant at this point I feel selfish for saying that because I love my baby and want them more than anything im just so miserable! I'm constipated, nauseous and my chest hurts and I have super bad insomnia so I'm always tired and my head hurts constantly. I don't know how women enjoy being pregnant and make it look so beautiful and joyful. I don't even have the energy to brush my hair. :(  I finally thought I started to feel better but nope I was wrong. Does it start getting better after the first trimester? I know it'll be worth it but just ughhh!!