It may be a knot in your rhomboids, levator scapula, or the erectors.
If you choose the route of the foam roller, you should also hug yourself and open up your back and roll in between the shoulder blades and the spine, and whatever other area you find that feels good to work.
The way I like to get around things like that is to just find a bar that's at the appropriate height and dig my back into it.
After doing the above, stretching the lats and neck will probably be helpful.
For the neck, the first stretch and the stretch at the 3 min mark will probably be most helpful, although all the stretches are good.