My LO has a pretty bad flat head on one side. We're good at doing positional therapy and giving him lots of tummy time, but I don't think it's gotten much better over time. We were back at the peds today and again his answer was to "keep an eye on it." When asked when they start to get concerned, he indicated that he'll get worried about his head if it's still flat at 1 year.
I researched a bit online tonight and the stuff I'm finding seems to suggest early intervention is key.
What is your doc doing? Was your LO referred to a specialist? Are they wearing a helmet yet? Or is your doctor like mine and you're taking a wait and see approach.
Thanks!: )

DS #1 born 12.3.13
BFP #2 09.21.14 EDD: 06.06.15

Re: What is the doc doing about your baby's flat head?
Everything I've heard says to treat it early, at least in cases of helmet therapy. I've heard there's not much point after 9-12 months, because there head growth slows down. You want the big growth periods, to really make a difference.
If I were you, I would totally seek a second opinion. Or if your insurance allows it, seek out a physical therapist on your own.