Jess, yeah that's right. My DP is French, but Lebanese by heritage. He's quite dark-skinned, and I tend to tan rather than burn, if I ever go out in the sun! The spots look a bit like a bruise, but they'll fade within a couple of years hopefully. Don't want it to look like I've been hurting my little boy!!
I think you're pretty accurate with your tongue-tie description, from what I know.

Sass, I don't know if the Dr would have mentioned it, or even checked for it. Maybe ask your MCH nurse? I do know, however, that even BFing is messy around here, and I keep a pile of flanny nappies on every armchair in the house and one over my shoulder all the time for the clean-ups required! It's normal for bubs to guts and scoff like little piglets at this stage, apparently. I don't know how that works with bottle feeding, sorry!