Breathing question

I notice sometimes when my little Tanziq is falling alseep on my shoulder as she loves to do, her breathing changes. It kind of sounds like she is slightly wheezing as if she has asthma. Is that just what it sounds like when they breathe deeper while sleeping?

Also, there is something she does that I cannot describe properly. Her whole body goes into these rythmic spasms sometimes. It's as if she sneezes about 10-15 times in a row, but she makes no noise. It's just kind of like her body jumps. But after she is fine. Not sure if I should be concerned. She will be 6 months on the 21st.