My 6mo old girl wheezes really bad but doc said its not actual wheezing but didn't do anything to help, what could it be?

Wheezing: The "wheezing' sound you hear may not be coming from her lungs but from her nose if she is congested. If she has a bark-like cough and a hoarse voice, the sound could be stridor caused by croup. In any event, if your baby is wheezing, having fast and problem breathing and difficulty taking her bottle, she should be reevaluated because she may need nebulizer treatments. Seek a second opinion.

Tracheomalacia?: Wheezing is the noise made by narrow or swollen small airways in the lungs. Some babies have noisy breathing for a different reason, such as a main breathing tube that hasn't grown stiff yet (tracheomalacia). The main thing to do when your doc says noisy breathing isn't wheezing, is ask what it is, and what, if anything, should be done. Often it's safe and will be outgrown without doing anything.