I'm on my first grow as well, and I had some stretching like that. I re-potted a few of them deeper into the soil. Then I put the lights closer and it seemed to help. If your lights are already 2-3" away then I'm not sure why they would be stretching. Maybe they didn't get enough light when they first sprouted.

Get some fans in there and if you are worried about the smell at all, i suggest you get a carbon filter or make one. I'm on day 31 of veg and they are starting to smell stronger by the day. It may be a pleasant smell, but it sure would give away that you have something going on in your room.