How long will it take to recover from a sub massive pulmonary embolism?

Several months: Anticoagulation, lung clearing the clot, and physical recovery depends on severity of lung damage and hypoxia.

It varies: Everyone is different. A lot depends on your health prior to the event. Also, the type of therapy used to treat you initially.

Weeks: It usually takes weeks to start feeling better from an embolism to the lungs. It also depends if there is any damage to your heart. The body will start dissolving the clot and you can start to feel better sooner. The blood thinners prevent future clots while the body clears the current clots.