My guess is that she will be there tomorrow, cleaning out. Call the office to confirm.
Otherwise, let it go. Frankly, lots of parents cannot afford to do that, and teachers understand. And the greatest thing she got, I assure you, was a handwritten thank you note from the child!!
We always did a group collection - coordinated by the room parents, in fact - so the teacher didn't get overwhelmed with 25 small trinkets or buckets of cookies. As a former teacher, I can tell you that it's impossible to display, store, use or even re-gift that many well-meaning but endless dust collectors!
Don't beat yourself up about it!
Instead, learn from it. How many other parents might be in the same boat? They are frazzled, they are unemployed or working 2 jobs, they have several kids who have several teachers each plus a gymnastics teacher and a baseball coach, have been to 3 recitals and 2 assemblies, have volunteered for Field Day, have a disabled child or sick parent/spouse, and...well, you get the idea! What if, next year at Christmas and year-end, you (as the room parent) sent an email or notice to the parents saying you are suggesting a group collection of ANY AMOUNT? Say you are open to suggestions about what to get the teacher once the money is in. That way, people give what they can - some $25, some $5, some $1. The card says "from the class" - no names listed! It's okay - you never know who is going to the food pantry every week or not able to make their rent or buy prescriptions, so there can be no shame/guilt attached. (There are several ways for people to give you the money without everyone else, or even you, knowing who gave what. So it's truly anonymous and a free-will contribution.) Parents will LOVE getting a meaningful gift and having someone else do the shopping. Teachers will enjoy getting something big they couldn't afford on their own, whether it's a gift card or a really nice dinner out (vs. a $20 gift card they had to add their own money to so they can go out with their husband or a friend). You can ask for a volunteer or 2 to help you collect, and someone to help with shopping. Set a deadline, and if anyone gets to you after that, the money goes into the end-of-year gift. No harm, no foul.