Off Center Front Tire

[Solaran]

Hi everyone,

So every once in a while when riding, I've been hearing this odd 'whum-whum-whum' noise at various speeds when going along. I thought it might just be the road, but it'll start and stop on the same fresh paved road. Yesterday after riding and hearing it again, I stopped and took a close look at my front tire, as that's where the sound seemed to be coming from. When looking from the front of the bike towards the rear, the front tire seems to be offset towards the right (left when sitting on bike). It's about a finger's breadth away from the fender on that side, while about a thumb and a half away on the left (right if sitting).

On the side with the larger gap, there's a ring of what looks like lube close to the fork, but well away from the wheel proper. It's about as far away from the fork as the wheel seems to be off center and the distance separating the two is darker like it's also been lubed. I did take a spill about 2.5 weeks ago, going down on that side, and did scrape up the front fender (and bent the foot peg, dinged the gas tank, and bent the turn signal, good thing this is my (brand new :cuss learning bike), but I think I remember hearing that noise before the spill. The forks look straight, heck everything looks right except for that gap and the random ring of lube.

My questions are:
A) Is that normal, that much difference between the 2 sides? (I'm guessing not...)
B) Could that possibly be making the noise? (I'm guessing so...)
C) Is re-centering a wheel difficult? Or should I get a shop to do it?
D) Would a drop cause something like this?

I'll see if I can get some photos ith my digital camera and figure out how to post them.

Thanks for any help, thoughts, or comments.