My understanding is that Heparin is more controlled than the Lovenox as far as getting out of your system quicker. I am currently taking Heparin injections twice a day (5k units each) to prevent my blood from clotting off my pregancy - currently 5 weeks. I previously had two miscarriages before they found that I have Factor Five Leiden Heterozygous - which causes my blood to clot quicker than the normal person. Hence, clotting off the pregnancies. I would suggest that you speak to a hemotologist regarding your concerns and my guess is that they will suggest Haparin, as mine did. I will take it throughout my pregnancy and 6 weeks after delivery - when the chances of blood clots go up. Remeber, you are doing this to protect yourselve as well as your baby.
Exect bruising and some discomfort at the injection site. Good Luck!
Thank you for your comments! However, I posted this about 9 months ago and on April 28th had my healthy, beautiful, baby boy! All the shots were worth it! I ended up being switched to Heparin and had forgotten to take the shot the morning I had my son which was a surprise. So God was watching out for me and I was able to get my epidural!
Sorry... didn't know you were already pregnant! Congrats on your healthy baby boy!