Undiagnosed but searches keep bring me here to ILC

I am not diagnosed yet but whenever I look around here and elsewhere, I keep seeing how what I have going on resembles what I read about ILC, so I figured I would post here in the ILC section.

So, at 12 o'clock on my right breast I have a thick, hard, flat, spread out, immobile, craggy type mass that feels like it is attached and just coming out of the tissue underneath. I found it during a self breast exam on 6/13. It doesn't hurt when touched and has been felt by a gyn APRN, a radiologist (dr) and 2 techs and is totally different than anything in my other breast. Now I can also look down at my breast and see this area too. Nothing showed on ultrasound or mammogram though and they said they are sure I'm fine and to come back when I'm 40. Never got a definitive answer about what this is though. I have an appt with a breast surgeon after getting a referral from my gyn office but it's not until 8/10. The thing is, I am noticing progressive changes in this breast. On the inner side of this breast where I'd been having pain, I found another hard area, but this is different. It is harder than the rest of the breast still but is in the shape of what you would describe something that is branching out. It is very visible during my self exam and you can litterally see and feel that this is there and is that shape. Also, going outward from this toward my chest and sternum, it is thicker, harder and lumpier in a more spread out manner and also visible. None of this is present on the other side. Now, the lower inside of this breast has changed in appearance. It's hard to explain but there is basically an outlined area where you can see that it's changed and the levels of tissue are different inside and outside this outlined area which follows the bottom curve of my breast. I also now have a small but very obvious indentation on the upper outer part of this breast as well. None of any of this in my left breast. My right breast was getting horrible piercing pain periodically (in the spot I eventually found the hard branching) but now it's mostly a pressure and pulling in this breast with stinging pain as well and just feeling like there is something in my breast.

Thoughts on this? Though I obviously hope it's just some crazy benign breast changes and know I have my young age and no family history going for me, I can't help but noticing the similarities between what I'm seeing and feeling in my breast with what I've read about ILC, down to it not showing on mammo or ultrasound despite being felt and now seen through the skin.

Would you feel comfortable waiting till 8/10 for an appt or would you try to get in sooner? I don't want to call the doc and sound unreasonable or like a Dr. Google hypochondriac type asking to be seen sooner but at the same time, I'm concerned about these mounting changes and problems with my breast, all of which I'm taking pictures of since I can see it. Let's say this did turn out to be ILC, could waiting another few weeks lead to it progressing significantly more?

Anybody know any benign conditions that kind of mimic ILC? I'm remaining relatively calm because I know worrying won't help me, but at the same time, for whatever it's worth, I do not have a good feeling about this.