My mother prayed to and gave to St. Jude ever since I can remember. We have given to St. Jude from our beginning as well. We visited the St. Jude Research Hospital in Memphis. What a place.
St. Jude is amazing!
I strongly recommend that you take your prayers for Terri straight to The Top.
Consider: that's the model Jesus gave (cf. Mat. 6:9; Lk. 11:1-4; John 17 -- ask "Who is he praying to?"); it's the model St. Paul gave -- whenever he mentions his prayers, he's always praying straight to God; and it's the model the early church gave (cf. Acts:24-30).
Since you desire that your prayers be answered as theirs were, use the same model that they used. St. Paul teaches in Philippians 4:6 that we ought to "..present [our] requests to God."
It's critically important that all of the earnest prayers being offered on Terri's behalf be properly directed to The One Supreme Power in the Universe with the capability to move all of Heaven and Earth to answer them.