My baby is 5 months and 3 weeks old.  She usually gets these raid breathing spells that last for about 5 seconds.  her breathing is very shallow and fast and she makes noises sometimes.  she is not sick, as in fever, vomiting or coughing. Should i be worried.
After going through the history of your child it doesn't seem to be problematic. Usually baby has an irregular breathing i.e. for some seconds it will breathe fast and for some it will be slower. This is usually a normal pattern in a newborn child. If your baby is feeding well and having proper weight gain also achieving developmental milestones with age then no need to worry. Faster breathing needs special attention when associated with1] High grade fever.2] cough3] Feeding difficulties.4] Increased respiratory muscle activity. If any of above are present then please consult a pediatrician. Hope this helps you.