@emann Omgosh girl, you are NOT ALONE.
With my daughter I tried. I really did. No milk for 2 weeks led me to madness. When I got pregnant with my son I told everyone not to buy me breastfeeding stuff. I was planning on trying without the pressure I had with my daughter, but circumstances changed, and he never got a single drop from my breast.
Both my kids were big when they were born, both of them have grown like weeds with formula. But that didn't stop the guilt and shame. With my son because it's more recently it hurts. Even yesterday he was hungry and I was holding him, his mouth was right by my breast and he started trying to latch. It tore me apart. I started crying and was basically inconsolable the rest of the afternoon.
Since I've been through this before I promise it gets better. My daughter is 10 now. She's at the top of her class. She's extremely healthy, she never gets sick like at all. And she's a VERY happy kid. Even if she struggled in school and wasn't as healthy, she is HAPPY.
By the time they are her age nobody cares if you were breastfed or not. It stops mattering. By then there will be new things to have mom guilt over. It's never ending, but this will pass. You're doing a great job and don't let anyone tell you otherwise.