FTM currently in week 36. it normal to feel much more sleepy, tired and cranky than usual?

I used to do pregnancy cardio/hiit workout or at least 30 mins walk once every 2 days in 2nd trimester… ever since week 35 my energy level dropped so much and i feel lazy to do workout, currently only do simple stretches once every 2-3 days. I get mood swings more frequently as well. 😭 I really want to stay active but i’m so tired😭