Hi I'm Taking Ultra Cycle Low. I'm On The Third

Hi I'm taking ultra cycle low. I'm on the third month. Before my period was regular Since I started the pills my periods are not regular. My doctor says it will regulate between 3 and 4 months after starting the pills. I'm thinking my period is late now , but is it ? Cause I'm thinking if it's supposed to regulate with the pills I'm taking shouldn't I get it in 2 weeks when I will be on my placebo pills week? And this way it will regulate ? Please help me . I had some bad cramps when my period was due 2 weeks ago . I still have little cramps now , little increased urination but I NEVER miss any pill and I always take them on time. What do you think ???