Slight stitches in my rib cages, both sides. Could be nothing, could be pulmonary embolisms. My first PE presented as a similar symptom, although that was about 5x more painful initially, and later twice as bad as that. But never really experienced breathing issues. Gotta schedule a CT scan. In the meantime, back on blood thinners. Really hope it's nothing. That's the problem with many medical conditions. Symptoms could be benign, or they could indicate a very serious issue. Given my recent history, I'd like to get a scan tomorrow and hopefully it's nothing.