OT: 5yo has been highly sensitive and emotional

Nothing has changed in our routine, I'm not preggers, we are happy no major fights in front of her, she sleeps fine etc. Is it a phase? She's always been a sensitive newborn and recently I noticed she's gotten more emotional as she got older, cries at every little thing, for example, when say I will keep her colour pencils away she's hasn't used for weeks (leaves it at a corner) in a normal tone of voice etc. She behaves well generally, but always wants attention every way she can.