Would worrying help the situation in any way?
I don't think Apple is going to replace a screen with 1, 2, or even 3 stuck pixels but you could ask. Trying to keep everything in your life perfect is a sure way of driving yourself nuts.
It's not uncommon for LCD screens to develop stuck or dead pixels over their lifetimes. Massaging works sometimes, the flashing method works sometimes, but my sense is that focusing on what is wrong or could go wrong is causing you more anxiety than the actual problem. Take a deep breath, realize that nothing in life is perfect, and that the screen's slight imperfections do not reflect on the quality or worth of your life. Go for a walk, sip a tea, and let in everything in your life that isn't stuck.
Yup, I would be bummed if my screen developed a stuck pixel, but as I look at my screen now, there are a few tiny bits of dirt/dried pizza/ etc. on my home computer's screen. They probably cover more than 1 pixel and I didn't notice them until I looked for them.
Life isn't perfect. It doesn't have to be. And you'll still be fine.
Best regards,
Mike