Symptoms...?

I am 6w 2d with my first baby and in reading all the posts online I've started to get worried. I haven't had any symptoms at all yet (besides the obvious missed period). No morning sickness, no heartburn, minimal bloating, breasts aren't any bigger, sleeping fine at night, not peeing more than normal, etc. The only things that have seemed any different at all are I'm more fatigued/moody and my boobs were a *little* sore/tender last week. But that's it! Should I be worried? Or is this normal?