Hi there everyone!

I have been on yaz for 3 and a half months now and it seems to me that my period comes and goes as it pleases! First month my period lasted for 10 days after which my dr prescribed something to make it stop. 2nd month i had no period but a lot of spot bleeding throughout the month. This month it didnt start on the inactive pills but started yesterday  - 10 days into the active part.  Did my cycle shift? Should i just continue taking the active pills and hope that it will happen on the right day next month (in two weeks time) or should i start with a new pack when my period has finished? 

Please give me advice!!