well I have two St Therese stories that seem like more than coincidences to me
the first time I prayed to St Therese, I didn’t even believe in the intercession of Saints… I was just trying it out because I really needed prayer

anyway, right when I finished, I looked up and saw a vase full of roses in front of me in my room. I don’t understand how I didn’t see it there before. This was early in the morning, and my mom had put them there - and she doesn’t do this regularly. (this was the only time it was a whole vase).
the other time, I was praying on my way to the dentist office, then I went in the office and sat down, and finished my prayer… then I looked at the little table beside my chair, and saw a kleenex box that had roses drawn on it and it said “la petite rose”… well St Therese was French, she’s known as the “little flower”… her symbol is the rose… “la petite rose” is “the little rose” in French… hmm…
she is a good friend
I think that even when it seems like a coincidence, it’s more likely that it’s not =)