Is it possible to judge the effectiveness of EllaOne on the basis of cervical mucus?

I have a very irregular period. It happens every 28, 30, 35 or even up to 41 days. A week ago I took an Ellaone tablet. All week last week I had gestures, white mucus. Since yesterday appeared transparent, pulling. Can this indicate the action of the tablet and the delay in ovulation that can now occur, or the fertilization? I would add that according to the calendar period I should get in about 4/5 days, but as I say it is very irregular and I do not know what to expect.