switched birth control yet still getting period early, help!

[actorgrl04.livejournal.com]

I know I have been posting a lot lately, but I just keep having problems and it is frustrating!!

I switched from Microgestin to Sprinterec a three weeks ago because I was getting my periods earlier than usual and the doctor thought I needed something with higher progesterone.

Well, I am on the third week and once again, it has came early! Ah!! What the heck?!! This is so frustrating! Nothing seems to work?

I did take one pill a few weeks ago late, but took it as soon as I could and with the pill of that day.

Does anyone know if it is just because it will take a while for my body to get used to the change? Or is this not normal?

The doctor said to take three packs in a row with out a break for inactive pills and I haven't even ended this one yet.

I did email the doctor and ask, but wondering if anyone here has some advice?

Thanks!