PCOS and trying to get pregnant

I'm 25yrs old and I've been told I have PCOS I've been fighting my weight for years now and even thought of medication to get pregnant! But I finally set my mind and started eating right and exercising and I've lost 50lbs since I started. I finally got my period after almost 2-3yrs of not having one. 
So I guess my questions are how long does it take to regulate your periods and how will I know if I get pregnant? 
I've read that with PCOS a store bought pregnancy test wouldn't give an accurate answer. 

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