Pulmonary Embolism Support Group
By far the most common form of pulmonary embolism is a thromboembolism, which occurs when a blood clot, generally a venous thrombus, becomes dislodged from its site of formation and embolizes to the arterial blood supply of one of the lungs. Symptoms may include difficulty breathing, pain during breathing, and more rarely circulatory instability and death.

You probably will be fine. Obviously no one ever can predict with 100% certainty that they will never clot again.
Hang in there. Keep walking and trying to get back to as much normalcy as you can. Distractions really help deal with the frustration, stress and fear.