Anyone else's little one breath fast?

Kirsty
My little girl is 5 months and since birth she has had periods where she seems to breath faster. She is fine in herself no temp or cough and is not pulling her chest in when she breaths. But her breathing just seems quite rapid sometimes and it's got me a little worried. She is feeding as normal and seems her happy self. Just wanted to see if anyone one else's little ones do this? Will be popping her to the doctors just to get checked over tomorrow