QUOTE(sarah-flute @ Mar 23 2006, 06:54 PM)

Well I can feel that my throat isn't right when I sing like that, and if I do it too long it hurts it, which can't be right?
Lowering the larynx is one of the hardest things to do when singing, and it takes time to fix like anything else. Don't think about "pushing" it down...if you try it you'll most likely feel something bulge out at the bottom of your jaw, which is the root of your tongue and which is pushing the larynx down unnaturally...it can eventually block off the sound completely.
In my (admittedly somewhat limited) experience, the larynx tends to rise because of inadequate support elsewhere in the body (I'm still working on it myself, but already it's SO much better). If something else is out of whack, the vocal tract shortens and makes it easier to hit high notes with the amount of support you've managed to achieve. It's possible to sing well with a somewhat lifted larynx, but a) you will sound even better once it's lowered and b ) if the lifting's excessive, it will hurt, as you've described here. Where the larynx naturally wants to go when you sing is at first often connected to habit rather than to nature itself, and while it's pointless to try and force it the other way as a quick-fix, you do have to sort of recalibrate things to remind it what nature intended it to do.
According to my singing teacher it's also often connected to tension in the jaw and the back of the neck - be aware of this and try to relax these muscles when you're singing. When you have another lesson, ask your teacher what muscular tension you need to work on, and maybe think about starting a little yoga or Alexander technique.
You say you've only been having lessons for a couple of weeks, which makes this lifting completely normal - time and good technique will sort it out. It'll lower gradually until eventually you're not aware of it at all.