Lost My 17 Yr Old Fluffy Monday Night

Monday night I had to put my beautiful 17 yr old cat Fluffy to sleep. She had been suffering from CRF and over this past weekend started to have some issues. Late Monday night she started having a seizure so I took her to the hospital. She had another one there and we decided it was time. Her little body was giving out and we didn't want her to suffer. I am just a mess. I work from home and we were together 24/7. I basically took care of all of her needs and she was a very loving sweet cat. I had a cat bed on my desk so she could be with me while I worked - she wouldn't have it any other way. She loved to be on your lap and constantly be loved on. Now the house is empty and I feel lost as the routine with her has been broken.
Fluffy was a very special cat to me. I know all owners feel their cat or dog was/is special but you know how there is one animal that just seems to have a special quality? Something about them just rises higher than the rest? She was like that. I've had other cats but she was definately a special being. I was always convinced she was an angel sent to me.
Anyway, I'm working and trying to get through the week and keep myself occupied. I know in the future I'll have new fur babies to bring joy into my life but right now I just feel like I lost my best companion in the world.