You can get foamy pours and also have the beer be undercarbonated, which sounds like what you have, maybe. Maybe turn the pressure up to 20 psi and let it sit for a few days, bleed the excess pressure and then set it at whatever you are going to serve it at, probably less than 10 psi. Once its carbed (there are bubbles in the beer, not just foam) I don't worry too much about too much foam - let it sit in the glass for a few minutes and you're good to go. I like a nice layer of foam, its part of the good-beer experience for me. And some folks say it helps enhance aroma, always a good thing.