Pulminary Embolism

Does anyone have any experience with treating a PE?
I've been on Lovenx for one week with no appearent improvement.
For the last three weeks, I could not walk 6 ft. without total exhaustion.
This is despite having a 95% O2 at all times.
I've had a filter installed to prevent anymore blockage.
I'm scheduled for my 4th chemo treatment on 3/14.
The only treatment that the pulminary Dr.'s offered was chemo,
Lovenx, and time.

Hope you all can offer some other options.

Thanks, S.Fic