Looking for some support + positive thoughts

🐘🐘🐘 • 👧🏼 born 1/19/16. 👼🏼 lost 9/15/17. 👼🏼 lost 11/26/17.
Tomorrow my 12 month old is having a kidney + bladder ultrasound. She's battling her 3rd UTI in the past 2 months and her doctor is certain she has a congenital urinary tract defect. She may need surgery. 
I have to starve her for 3 hours prior to the ultrasound and get her to drink as much water as possible :/ I don't think I have the strength for all that!