HI! I'm international student in Toronto, I am 25 years old, I arrived here on July 27 and my last period was regular on August 09, but now I have 4 months without period, I made 2 pregnancy tests and come out negative and I went to the doctor as 1 and half month ago, and he told me it was normal for the change from my country to here, but I have my doubts about that, he only made a pregnancy test and he told me i should wait. I am really worried, I don't know what happen and I don't know doctors in this city, if somebody could help me, I'll be really appreciated.