When you are 2 weeks pregnant, pregnancy symptoms may make a weak appearance. Nausea, headaches, and mood changes may be on the way. You may also experience a tingling sensation in the breasts and vaginal discharge. As of this week, prepare yourself for a healthy pregnancy. Start with a minimum of 400 micrograms of folic acid, as it will contribute to the development of the brain and the spinal cord of the embryo. Cut down on caffeine, and find an OB/GYN that you can trust and rely on, as you will be consulting them for the next nine months.