Well, it sounds like the extra running might have triggered the clot, so you may have intermittent compressions, more than a constant one. Maybe due to the arm positions during running..

You could work on posture and keeping the chest/shoulders area open for more blood flow.

Since you are on the blood thinner your risk for another clot is lower.

Quite a few with this scenario do decide to wait and see how they do, then surgery is always the option later on if needed.

If you can get some expert PT or expert chiropractic sessions to make sure you get a good start on any posture & body mechanics, and make sure there are no misalignments...

You can search here for VTOS and other posts about it.