Happened to me, too. Only mine did travel up into to both lungs. I am surprised by the similar stories here of bloodclots being found while diagnosing other symptoms. I developed post-surgical ileus and when they x-rayed my stomach area they happened to catch a portion of the bottom of my right lung and saw the clots. Upon further testing, I had clots in both lungs and 3 clots in my left leg. I had no symptoms of clots. They talked about the possibility of having to do the filter thingy, but my leg clots were below my hips so I didn't need it.
Depending on who came into my room at the hospital, I was either very, very lucky to be alive, or never in any real danger, because the clots in my lungs were small, though numerous, but not in compromising areas??? Still feel lucky as I live in the country and depend on a volunteer emergency squad, so who knows for sure if I hadn't gone to the ER that night after a couple days of sickness and no appetite.
Our hospital has a Coumadin Clinic, so I spent quite a bit of time there for the next 6-months. And yeah, I lost hair. They said it was NOT due to the Coumadin, but me thinks otherwise
Hang in there and you will be in my prayers.