Hello, and I hope I can help you today. The complication of getting blood clots in the legs, called a DVT, or groin is uncommon but not rare during pregnancy. Normally, the clock will gradually disappear with the aid of blood thinners. It actually takes somewhere between one even more than three months for the clock to actually dissolve and be reabsorbed by the bloodstream. Therefore, the symptoms of pain, and swelling in the leg where the blockage occurred are not unusual while this is taking place. The most dangerous complication of a blood clot in the legs for pregnant woman is if a piece of the clot actually breaks off it can travel through the bloodstream towards the lungs and cause serious complications for breathing and sometimes even death. So symptoms your daughter-in-law should watch out for our shortness of breath, chest pain, or feeling very anxious with a rapid heartbeat. In terms of pain control for right now, applying a hot water bottle (comfortably hot) to the groin or soaking in a warm bath can help to relieve the pain symptoms at this time. Your daughter-in-law should discuss the further management of her blood clot with her doctor but in the meantime it is much too early to see improvement in the pain. I hope I was able to adequately answer your question today, and that this information was helpful. Best wishes to your daughter-in-law for the rest of her pregnancy, Dr. Brown