I think you have a decent chance at an ED acceptance at Barnard, but I’m also confident that you will have great options if Barnard doesn’t work out.
It doesn’t appear to me that you need much advice at this point; we’re at the wait-and-see stage now! The one thing I would suggest is that as you work on your UC apps, you consider applying to the College of Creative Studies at UCSB. You strike me as a great candidate for their “grad school for undergrads” model. CCS requires a separate application, with an essay and recommendations, in addition to the UC app, but the priority deadline for the CCS app isn’t until January 6th, so you can wait for Barnard’s response before doing that additional work. Available majors include bio, chem/biochem, and computing, among others, and CCS students can also do minors or a second major outside of CCS. I feel like you’d be able to write a pretty compelling essay about your research work, that would make you a great candidate for this program. But at this point, the only action item would be choosing a CCS major as one of your two major choices for UCSB, when you do the UC app.
Good luck; I hope you’ll update us!