So my daughter, aged 14 got her period last year in November, then in December she didnt get her period, so i thought that was normal because I know teens can start their period off really irregularly, and so she got her period again in January, and its been almost 4 months since January -its almost may and her third period has not come yet- and her period has not come yet.. i ready that its normal for the second time to be irregular, but is it normal for the third time.to be irregular too? Ive read in some articles that my daughter may have a problem?? Im not extremely worried because it hasnt been very long, but I want to know when I should be worried about it. Thanks!