Comparing pregnancy in late 30's with pregnancy's in 20's.

Megan • Mother of five. I am a respiratory therapist, a sometimes piano teacher and I'm a Mormon. Yay
Hi everyone.  Just wondering if anyone else is pregnant in their late 30's but also had children in their mid to early 20's.  
I'm finding this pregnancy soooo much harder.  I'm way more exhausted.  Maybe that's because I have 4 kids already and more weight thanks to those children. 😳
But this time around my knees hurt more, my shoulders hurt more, my feet hurt more. And when I try and go on walks I start contracting like crazy so I've been limiting the exercising.  
I might need to get a hysterectomy due to a pregnancy complication. 
Getting older isn't for sissies that's for sure.