Two weeks does seem like a short time to take blood thinners after an unexplained embolism. Clots can take weeks to months to dissolve and from researching this morning, patients with pulmonary embolisms are on for several months. I know yours is in a different location but it would seem to follow…

What I did find was information about how an Ovarian Vein Thrombosis might occur and it often has to do with a condition called Pelvic Congestion Syndrome.

An excerpt from an article I’ve posted below:
“Pelvic congestion syndrome, also known as ovarian vein reflux, is a painful condition resulting from the presence of varicose veins in the pelvis. The condition is caused by valves in the veins that help return blood to the heart against gravity becoming weakened and not closing properly, allowing blood to flow backwards and pool in the vein causing pressure and bulging veins. Diagnosis of the condition is done through one of several methods: pelvic venography, magnetic resonance imaging and pelvic and transvaginal ultrasound”

Were you having any discomfort before this happened, not just at the time? I’m not a doctor and absolutely not diagnosing your situation but this does give some possibility of why you developed an embolism out of the blue in your ovarian vein if you’re pooling blood there.

One avenue you might want to pursue is getting an appointment with an Interventional Radiologist or a vascular specialist (a doctor who corrects varicose veins). who can map your veins and see if your have a weakening in your pelvic reaction. You often don’t need a referral to a vascular specialist. They treat varicose veins and are interventional radiologists. I saw an IR for my legs. No more issues!

It would be worth a visit for you to find out and there are treatments to correct Pelvic Congestion Syndrome.
“Ovarian vein embolization is a minimally invasive treatment for pelvic congestion syndrome that is used to close off faulty veins so they can no longer enlarge with blood, thus relieving the pain. “ (from the same article posted below)
https://www.radiologyinfo.org/en/info/ovariveinembol
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I also found some information in our forum regarding PCS with this little video. Not sure if it’s relevant to your situation but any information at this point might be helpful for you.
https://connect.mayoclinic.org/event/video-qa-about-pelvic-congestion-syndrome/?pg=1#comment-383151
Are you currently having any more discomfort?