I am so sorry.
I work with a local prenatal/infant loss group. (All the mamas volunteer) I would suggest you have them take the photos, and whatever other remembrances they do. And ask that they seal them in an envelope. Take it home, put it away where you know where it is, but wont run into it everyday. You may or may not want it in the future. Or you son may want remembrances of his brother when he is older. Or your other children yet to be may want to see a picture of him. If it is not for you, you can just not open it, or give it to your son when he is grown. But you can never go back and get those photos re-taken if you don't get them. I know MANY women who didn't want them at the time, who treasure those photos now. I'm not saying that will be you, but it might?