Hello. I am so sorry for you and your baby. The advice you received already is awesome.
I know how you feel. One time my 3 year old beardie got off of her chair while basking and disappeared. I was like a freak!! We live in the country and I thought I would never see her again. I got the whole family to join me in the hunt. I let everyone know that the search would NOT end until we found Rocky.
After looking and crying for about 45 min, I happened to bend down to look under something and something caught my eye!!! She had climbed up our chain link duck enclosure. I was beyond ecstatic.
I was also very lucky. After that day, we NEVER let our beardies out to bask without their harnesses. They sell some very soft adjustable rope/string ones on Amazon.
Don’t give up hope. Keep looking for that poor baby, and let us know when you find her. I will pray right now?
Shann