I think you need telling ur doctor.
My son has cleft lip and palate and dr warned us to be careful not catching cold before mouth surgery.
Btw, I heard that removing tonsils is not always good.
I used to have big tonsils, and got sick a lot, went to two drs and they told me to have surgery.
However, it just suddenly ok. I never have it again since 7 years ago. It might be my diet changing. I drink herbal stuffs. Echinacea, Turmeric, Fenugreek. I also eat more veggies and fruits. Try these things first before opt to surgery. Without tonsil, it would b3 more difficult for her body to fight illnesses.