Welcome to the forum @magsp1 and thank you for sharing. As many people have already said, everyone’s experience is different and everything you are feeling is valid.
The forum is full of wonderful, kind people and I hope you find the support you’re looking for.
Here’s a link to the post that @Shi mentioned: Mountain Lion - Coffee Lounge / Chat and inspiration - Breast Cancer Now forum
And the post that @JoanneN mentioned: Very small DCIS and imposter syndrome - Diagnosed with breast cancer / DCIS/LCIS - Breast Cancer Now forum
Sending our warmest,
Lucy