My body is not the same :(

Patricia
I'm 44 years old and this is my 3rd pregnancy. I have a 14y/o girl, and a 12y/o boy. This is my "surprise!" baby. My previous pregnancies were amazing. No complications at all. This time, maybe because my age, it's not the same. Even though I have no problems so far, I'm permanently tired. if I start to do things like making my bed, cooking or dishes, I start to feel contractions and pain and just need to go to bed. Definitely my body is not the same then in my 30's. Anyone in the same boat?