There are 2 things that stood out to me.
First was… I am very familiar with someone in almost an identical situation… race, sex, CA, great GPA, great scores… the only difference is a prestigious private high school. She applied to very similar schools as you. She was waitlisted as several of the east coast schools, and eventually ended up at Berkeley (which in her case is the university closest to her home). She loves it. A little over a semester in, and she’s not sure why she ever thought about heading East.
You have an amazing opportunity already in the bag…so relax and look at any other acceptances as gravy.
The second was your comment about money. It’s not really a question of desire, it’s a question of perceived need by the schools. If the math says your parents can afford it, then the support you’re going to get from most of the reach schools on your list will be based solely on the math.
So… my advice to you would be to consider the following: What would you do if you get into Brown without much support? You may very well bump into this situation, and with arguably one of the best values in higher education in your pocket already, what is it worth to you to attend another school? Do you see yourself in grad school? If so, that should factor into the value/money math as well.
Congrats on everything so far…and try to enjoy the process (which is easier to do with sleep). It’ll all work out.