When will I start feeling better?

I'm 17 weeks now and I feel like crap. Every single day I wake up feeling the same. It's not so much nausea and vomiting. It's the back pain, the stretching pains, feeling no motivation, staying in bed all day and letting all the chores go, bad headaches, getting dizzy and almost fainting if I get up and do a lot. I just want to feel normal. I want to be able to exercise a little and have the motivation to cook healthy for myself and take my vitamins when I'm supposed to and drink enough water. But I just feel absolutely no motivation to do anything, and being in discomfort doesnt help, and everyone I know has seen the change in me and how I'm letting everything go. When does it go away?