Hmm - not over sensitized, but I was initially much more sensitive. You get used to it though. I remember speed bumps being especially fun for the first month or two. LOL
And I say you get used to it because I've taken my piercing out for weeks at a time and then put it back in. I take it out when I do long bike rides, etc. But I always notice it the first few days after I put it back in.