Tar! Happy to see your update, I followed you for a long time.
You are overthinking. What if someone came along and said, yep, that's a rebound. Then what would you do? Dump her now? Why? What if someone said, no, and you kept dating, but in a few months you realize she just isn't for you. Point is, this may or may not work out for you long-term, and labeling it rebound or not just doesn't matter. Enjoy what is happening in your life now, watch out for the red flags. Be authentic, set your boundaries, ask for what you need, pay attention to how she responds, listen to your gut. Don't think so much, Tar, enjoy this.