I have a very large varicose vein in my groin...

I believe the term is saphena varix, they said it's quite larger than average. I don't go back to the doctor until June to discuss treatment. I really want to start an exercise routine, but I'm freaking myself out because the bulge in my groin is so big and came out of no where. I don't know if I will make it worse? Anyone have any experience with this?