The 28-year-old then went on to explain that while it started out a little rough, she's now feeling a lot better and is revelling in her pregnancy glow.
"As my body prepared to enter the second trimester, those yucky symptoms began to subside and I am now loving my pregnancy, my changing body and feel glowy and glorious (most days)," she shared.
"Having another baby 10 years on, I feel more in tune with my body. I feel truly lucky to be able to grow this little life inside of me."
Alex also cheekily added in the caption: "Ps. Hair growth, no one told about hair growth! I am a literal Yeti!"
Fans were appreciative of her honesty, and made sure to send love and support her way.
"Congratulations and I’m looking forward to watching the rest of your pregnancy journey unfold," one user wrote.
"Looking great ! Congratulations, good luck with the rest of your journey mumma !" commented another.
Alex is already a mum-of-one to her 10-year-old son Elijah, whom she shares with her former boss.
This is her first child with current partner, Carson Jory.