Go to a doctor. Go to a certified electrolysis. Tweezing only increases hair growth.
it could be a result of hightened testosterone levels in your body, wich could mean a drop in estrogen levels, you need to speak to your doctor about it. He/she may put you on estrogen pills or progestrin pills.
i definatly think it's hormonal, i think your dr. can check your levels of certain hormones thru blood work
i had also heard this can be hormone related. definitely a dr related situation.
I wouldn't get rid of it until you show your doctor. It could be a hormonal issue or something else. I know heredity can also come into play with hair issues, but I would think that you would have seen it before this if that were the case and not so suddenly. Let someone look at it, preferably a health care professional before you let a cosmetician look at it. Their first reaction is going to be to get rid of it and you could have some underlying medical reason for it. I wouldn't worry too much about it, though.