Please help me to make sure whether I'm having vitiligo or something else.

Almost 2 years ago, I had a very unnoticeable small white spot on my face just next to my nose because it took a while someone to see it and almost everyone said that there is nothing. However, I realized that spot and went to see a dermatologist and he gave me the following prescription. Please bear with me because i think the problem that I'm having rite now is does have to do a lot with those medicine which I took.

MELANOCYL, Methoxsalen & AminoBenzoic Acid Ointment - once in 2 days (apply at 8am) ****he told me that once my face became inflame stop using this ointment

MELANOCYL, Methoxsalen tablets - 2 tablets in 2 days (take at 7am)

DIPROSONE Cream (Schering-Plough) - apply every evening at 4pm.

Ascorbic Acid (vit. C) 100mg - 3 times a day

Ferrous Sulphate tablets - 3 times a day

After following the above prescription for like 2 weeks, my face got inflame so I stopped following it. After that like 2 days after I stopped following the prescription, I left the country and now I'm in other country and studying. It was 2 years ago.

Now, the problem is my small unnoticeable white spot has become big just next to my nose and just above my upper lips. Even my moustache which exposed to that ointment becomes white and even hair in my nose becomes white.

Last week, I met a skin doc and she suspected that I'm having vitiligo but It is too hard for me to accept it and I was shocked. So, please can anybody say that this white spot is due to the medication that I took or it's just vitiligo ?? Please i'm totally depressed and looking forward to receiving any kinda opinions and thoughts. Thanks everyone in advance.