Should I take a test or is there something else wrong ?

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I'm 16 and my period has been irregular since I got it at 11. The one thing I know is a really heavy flow but my last period was unusually light. My bf and I use the pullout method. I don't know what to do if I should try to take a test or go to the doctor again. Last time I went for irregularity the doctor said that I should get on the pill but my mom is very against the pill and doesn't want anything to do with it cause something to do with paying pharmacies money for nothing that's also why she never bought me antidepressants even though my family and I have depression ..any advice 

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