I Can't Believe She's Gone!

I lost my sweet baby on Friday, 3 days ago. I still can't believe she is gone. Her name was Belle. She was a 3 year old Boxer. She was in great health. I didn't suspect anything was wrong. I came home Friday evening to find her outside dead. She looked so peaceful. Of all my canine friends who have passed away, I have never had to deal with seeing them dead. My family always took care of that part because I was too young. This is the first time I have found one of my "friends". It was awful. I have 2 children, one is 4 and one is 2. I had to keep them distracted while I covered her up. She was too big for my to carry or move. Then when I went back outside there were neighborhood kids in my yard, uncovering her. I was so furious! Everyone around me thinks I am overreacting. I cry everyday. I can't stand to look at her chain outside, dog food, food bowls, etc. Even now while I am typing this she would have been underneath the desk laying on my feet or my feet would have been laying on her. There is a part of me that says I need to rush out and get a new dog. But another part that, the larger part, says no way. There will never be another Belle. So why even try! I just can't believe my sweet baby girl is gone. She was such an angel. She never hurt anyone. I don't even know what happened to her. My husband says it was probably a massive heart attack. All I know is that she is gone. I don't have my Belle "pillow" anymore. She would lay on the couch and let me use her body as a nice warm pillow. She loved it and so did I. I fill like I am going crazy. Is is ok to hurt this much over her death?