Few questions about my lip piercing?

Ok, first off, I did it myself. Save your comments telling me I'm stupid. I got enough of that from my mom. I don't think I'm "hardcore" or "tough" in any way shape, or form either.

So anyways
I got my piercing December 31, 2009. Its been three days. I just got a real stud today. The swelling has gone down a lot actually but I have a few questions that I couldnt find online.

First, my stud is embedding into my skin. Not a lot, it just started to about an hour ago and I'm not too worried because if I push it from the back, I can see the rod but it still sinks back in. But, I don't want it disappearing into my skin either. So is it normal for it to be doing this on the first few days? Or no?

And next, it has a somewhat of a heartbeat on that area of my lip I guess when the piercing sinks in. Is that normal too?

I don't think its infected because I dont show any signs of it being that way and I take very good care of it, my only problem is I still need to get sea salt. For now I'm using regular salt, but I don't like using it because I hear it dries out everything.