Do you think flossing more would help with overcrowding?

In what way ?: In regards to maintaining a clean, healthy mouth, yes. In regards to moving those teeth into alignment, no. Flossing always helps get into areas where your toothbrush can't.

No, see Orthodontist: The flossing is one of the most important things you can do to preserve the health and aesthetics of your smile. However, the best way to determine your options for correcting crowded teeth is to see an orthodontist for consultation.