Did I help the nurses or did I do nothing?

I'm a nursing assistant in the float department. Half of the times, we would work on the floor of different units and the other times we would sit. When I'm working on the floor or sitting, I work very hard, giving 100%. Today I worked on the floor for a cardiac unit. I had 13 patients, although some of them got discharged at the end of the shift. I didn't take my 15 min breakfast break because I was busy. I didn't take my lunch break as well because once I was done with sugars and afternoon vitals, there was a new admit, I was putting in the intakes and outputs,etc. I felt so tired at the end of the shift. However, I felt like I didn't help as much as I wanted to, yet the time flew by so quickly. I did 10 morning sugars, morning vitals for 13 patients, put in the intake and output for each, helped patients into the transfer beds where they had to taken for tests, help them back into bed, take lunch vitals, afternoon vitals. I mean some of the patients were walkie talkies so I barely did any AM care, yet I felt like I was sooo busy and I felt like I didn't help out much...Is it just me or does it seem like I did nothing??