Has anyone experienced crazy weight loss?!?!?!

Chrissy • 26 years old, and having my second biological child. I am gonna wait till birth for sex reveal.
I have lost 33 pounds since week one my nausea has subsided but my appetite isn't great but I'm in my 18th week and in the last two weeks I lost 8 pounds in terrified they wanna chek growth scans on the 9th anyone HeLP