I am one of those lucky women who don't get morning sickness but I become super super tired. Oh and I have horrible SPD and it got worse with each pregnancy. Walking, sitting, standing just hurt so bad.
When I was pregnant with my 2nd, my energy was drained and my oldest and I took a lot of naps together. When Dane came, it took us awhile to adjust we found our groove.
Then Bishop surprised us and again I became very very tired except by that time I had one who wouldn't nap and one who would. So I was a very exhausted mama. I was also under a lot of stress.
It's hard to say how it's going to be. My pregnancies were very similar thankfully minus the SPD. We made it though. I did get extra help from my husband when I just couldn't do it anymore. When my hips hurt so bad that I was crying just sitting there or when I needed a nap, he was so helpful in saying to me to go lay down.
I wouldn't change any of it though because I love the 3 boys I have

I would go through the pain again to have the same outcome. I know when we go for our 4th, it's going to be the same and I'll have 3 kids on top of it but thankfully we're planning to only have one at home during the days (bishop) and the others in school.
We don't know what will happen, we just kinda have to jump in and hope for the best. *hugs* I hope I helped some.