First month of TTC, no AF and a BFN

St
This is the first official month that my hubs and I started TTC. I've been on metformin (500 mg once daily) for almost 2 years now. I have never been regular except for when I was on BC with the metformin. 
This month we stopped BC, but AF hasn't shown- even though I've had pms symptoms for the past week and a half. I took a hpt on Friday (one day after AF was supposed to come) which was negative. 
I know it's early for me to be discouraged but before the metformin we weren't protecting ourselves and for 3+ years nothing happened. I'm trying to stay positive this next month by concentrating on myself and making a drs appt. Can anyone tell me what I should ask about when I see the dr? (i.e. Upping my metformin, clomid- which I'm unsure about, ect.)

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