I didn't read through the rest of the posts, but I definitely recommend maternity pants. I'm 8w along and I can't stand anything tight around my waist. I found a couple of pairs at Motherhood. I'm not really showing at all, just bloated, and they are so comfy. The pair I'm wearing today are black dress pants with a wide elastic waist-band. They can sit low on your hips or pulled up over your waist.
I plan on wearing first trimester maternity pants forever!!!