The first thing you need to do is become organized with this illness. We can't depend on our memories for things like we used to. I have a routine that I do not break when taking my meds. If I'm not going to be home, I take the pills with me in a zip loc bag. But I do take things at about the same time every day. That is a must for me.
You can let the dogs out, put the puppy in a room where little damage could be done, and head to the hospital to be with your grandma for a few hours. The dogs will be fine and this will help break up the day for your grandma and you will get rest, too. You can sit back, put your feet up, and have a conversation with your grandma. It would do both of you good. If the hospital is close to you, and you feel the need, go see her twice in one day. I did that with my mother. Staying all day is difficult, not only on us but on them, too. They need to sleep. But breaking it up in two short visits worked for me. And I had none of the guilt I could have had.
You can do a lot with fibro if you just do it! Many times we convince ourselves we can't do something when we really can. Yes, you might have more pain but only for a few days. I know my Mom would be by my side if I were sick so I did this for her, too.
I do hope you are feeling a little better now. It is a lot to deal with but you can do it. My mother fell sick with a stroke 17 days after my husband died suddenly AND I was in the process of moving! Gulp! But I did it. I flew down to Florida, bought a new home and had the furniture moved and visited my Mom twice a day in the hospital when I arrived in Florida. My house was filled with unpacked boxes but my Mom was more important to me so I dealt with it. Just needed to find my sheets! 
It's like you get an adrenalin rush in times like these.
I sure hope your grandma is doing better now. That was a terrible fall for her. You take care of yourself, too. In this busy schedule, take some time for yourself and do some relaxation things to help you.
Sherrine