Pulmonary Embolism Recovery Time?

I ended up in the ER with a pulmonary embolism a little under 2 weeks ago. I'm taking the Warfarin and the Lovenox shots and getting my blood tested every couple of days. So, I'm doing what I'm supposed to. But does anyone know how long it'll be before I stop feeling like I can barely breathe when I walk more than a block or two? I'm a full time student, part time office istant, and mom of a 3 year old. This huffing and puffing and corresponding chest pain are really getting old. Thanks for any help!