That's a different kind of writers block. I like to write in first person and when I do, my best work comes when I get totally inside the head of my protagonist. On occasion, like right now, what's going on in there is intense. So intense, in fact, that I need to take a step back to allow my emotions to settle.
The current effort is flowing nicely at the moment and the main character has reached a crisis point in how he's handling and reacting to the situation he's found himself in.
It's likely to be a long story (its timeline is set to cover two years and I've only gotten about two months into it) I have no idea just when it will be finished.