Packing Rod and Stretching Question

I’m 7 months today on T and since about month 2, when I got my 3 in 1 packer, the rod has hurt. I’m 1 inch hard since checking a week ago or so, and my foreskin? Is a lil back, so the head is pretty open and sensitive. I’ve tried putting the rod in to keep the packer hard when I use it but it always hurts. Is the sensitivity of my head gonna die down or are packer rods only made for pre-t people? (I use Axolom’s knight packer) or am I doing something wrong? Perspectives and what you do(if you’re ok sharing) would help, thx.

Also, random scare of mine, I haven’t stretched at all and my biggest scare is that im gonna turn out like the 19 inch cis guy who has 12 inches of his dick as just inflamed skin and not an actual like part of it? Is stretching gonna do that to me where it’s just inflamed like foreskin or sum or would it actually help it grow more? It’s been like a horrifying thought in the back of my head for a bit.

Have a good day, sorry if this isn’t the place to ask, lmk a dif one if there is!