Enlarge this image

How your baby is growing
As conception only happened a few days ago you probably haven't missed a period yet. But if your little embryo has already made it to its new home, you may see a bit of spotting as the fertilized egg burrows into the wall of your uterus.

As minute as it is, your little blastocyst is now separating into two distinct parts: the amniotic cavity (or yolk sac) and the embryo (your baby-to-be). The yolk sac's main job is to protect and nourish your baby until the placenta is fully formed. Right now, the placenta is just beginning to take shape, but it won't be complete for about another 8 weeks. The beginnings of the umbilical cord are visible and partly functional, although it is still not fully formed.

How you are feeling
You may be feeling more tired than usual as your body is working extra hard getting ready to incubate a breathing human being. Your breasts could well be a little swollen and tender and you may be urinating more frequently. These are all common early-pregnancy symptoms. At this point your body is producing copious amounts of the hormone Beta-hCG (Beta Human Chorionic Gonadotropin), which increases estrogen and progesterone output and are the hormones that would result in a positive pregnancy test were you to take one now.

It's very early days, but you could schedule an appointment with your doctor for positive confirmation. In the meantime, you should make every effort to keep yourself as healthy and happy as possible. So no alcohol, no tobacco, no caffeine, no recreational drugs, get enough sleep and try to stay away from stressful situations.