Experiencing varicose veins during pregnancy is relatively common due to the increased blood volume and hormonal changes. For many women, varicose veins improve or even disappear after delivery. However, this can vary from person to person. In your case, since you have developed varicose veins in the last three weeks, they may reduce in size and appearance after you give birth. It's important to monitor them and consult your healthcare provider for personalized advice and treatment options. They can suggest compression stockings, leg elevation, and other measures to help manage the symptoms during and after pregnancy.