LO is almost 6 months and for awhile has been making these weird grunting & straining noises all the time...it kinda sounds like something is bothering her. But she sleeps okay and smiles a lot and seems happy too. We've taken her to the doctor plenty of times too and she is healthy they say. I don't think she is constipated either bc she has regular BMs. This just seems kind of odd to me. Has anyone heard this before?