Confused! Need help

So I'm ttc for five mnts now my period longest was 47 days I'm on cd 70 negative urine test at home n doc office. I was told I may have primary stage pcos and I can be prego but it's too soon to tel I was told to call in when I c my period caz they don't want to give me no pill to bring it down and I should walk for one hr 5 times per week no I start excerise but not walking squat n with a excerise ball yesterday was my second day and when I finish I wet to use the toilet n I was spotting call the doc office they woman say come in for tablet to bring it down ff app say I'm 12dpo from my bbt chart today.I think I'm pregant what should I do request an ultrasound before using the tablets?or just go ahead n use it? Or take a hpt at 14 dpo? Plz advise me. Thank you