Special dates and such are huge triggers, but congratulations for moving on and sticking to No Contact.
About this line
She will think more about you if you don't call.
I got some issues with it .. lol...
1 You can't control what anyone else thinks
2 You don't want her to think more about you, what for? what would you gain? this is ego...
3 Whether she thinks of you or not DOES NOT MATTER
it has nothing to do with your value... you are independent and got your own life and journey to live, to enjoy, to learn... no one has power over you, no one is superior to you.
Hugs... you can do this.
Remember the bad times and know that she has not changed.