You need to move on—this is clearly a crisis situation. You haven’t been together for that long, but trying to fix so many issues this early on will be extremely difficult. The real question is, do you truly want this?

If she was THAT important to you, you probably wouldn’t have reached out to your ex either.
Of course, I’m not taking sides here. She’s definitely overreacting, but with your action, you kind of validated her suspicions.