Hey hope you're okay. Had clots on my lungs in April last year too although only suffered from severe chest pain (I was 33 at the time). Not found the cause to be honest though Was in hospital for a week or so being given daily Fragmin injections and Warfarin tablets to thin out my blood.

Had to take Warfarin daily for six months a have blood checked regulary for its thickness. Will be under the consultant for 2 years as unknown cause, but am happy its being kept an eye on.

Hope you have a speedy recovery.