I have Protein S deficiency which is also a blood clotting disorder. When pregnant I was on shots of heparin or lovenox. When I have surgery I get a shot of heparin 2 hours before surgery, stay overnight and have pressure things on my legs and I am on heparin or lovenox for a few weeks after surgery. I have not had a clot. Feel free to send me a message if you need to know more. My surgeon had me get my hematologist send him a letter to ok me for the surgery. If you dont have a hematologist yet I would recommend you get one.
Good luck.