Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

The therapist you are seeing may have some tips on how to navigate that discussion with your mom.
Otherwise, is there another address you can have them sent to or can you pick them up at the post office?
At some point you just gotta do your thing and your mom is just going to have to deal with it. It will be hard for her but the more you become independent, the less choice she will have.
As the mother of grown children, I wonder if it would be smarter to work on disconnecting the leash rather than continually yanking it to its limits. Sooner or later, Sooner or later, both parent and child have to cut those proverbial apron strings.
Your well-being, you are responsible for. Your mom has to let you make the health decisions for yourself, and give you the space to do it alone.
We have an adult son living with us, and he is responsible for his health decisions. I keep my mouth shut until he asks, and I only answer what he asks about.
How did we reach this point of respect? He asked me some questions about my health and I said, how about both of us sharing medical information quietly so we can work together to determine what we share. In other words, heredity information was provided with the inclusion that no one would be told other than the specific place/person requesting the information.
That way, privacy is maintained, respect for personal health information is maintained, and everyone has the important information up front.