Hi Dr. Purushottam welcomes you to HCM virtual clinic. I have gone through your query. I think I have understood your concern, I will try to suggest you the best possible treatment options. Sintrom is a drug from coumarin family, that helps prevent blood clotting inside veins. You must stop Sintrom when you want to get pregnant . Instead you can use safer alternative like Low Molecular weight Heparin. Gradually shift from Sintrom to LMW heparin.It is a small injection to be taken on daily basis, you can learn and start taking it on your own, once prescribed by doctor. Aslo try to find out cause of thrombosis, get on to good diet and exercise regimen. Avoid staying in same position like sitting or standing for long time. You can use good fitting compression stockings and also get checked for varicose veins. I hope my answer helps you.