Is it usual to mention close relatives/next of kin in a will?

I was next of kin and on good terms with my sister who died recently. She made a will last year having been told she only had a few months to live. Her solictor who is also executor's been asking me a lot of questions about her affairs, other relatives etc, and I've helped the best I can. She lived alone and I've been worried about what's happening to her possessions property in the meantime so I asked the solicitor who replied he could only give that info to beneficiaries. I was stunned not to be one, and got a copy of her will from the court to find bequests to a few friends and the rest to various charities, no mention of me at all. I'm really upset that she hasn't left family photos & stuff to me - now I'm wondering if, under the pressure of her illness, she just forgot to put me in.