My periods were supposed to start today according to my BC Pills. What could be the cause of not getting them?

I enjoy be on pills for similar to 4 yrs but go past its sell-by date them a while ago. I hold be posterior on them presently for 1 month and own taken 4 sugar pills already, usually i would find my term today, the fourth day of taking sugar pills but i havent get them, i dont even have a feeling resembling their coming. Are they a bit out of wack because i stopped them and later started again?
I also surface a bit restrained head beside a headache and also my bf commented that my boobs look bigger!!
What do u guys have an idea that is going on? Plz serious answers!
Answers:

Could i be pregnant?

If you've solely be pay for on the pill for a month, it might give somebody a lift one or two more cycles for your time of year to go and get re-regulated.

Also, if the hormone dosage contained by your pills are too big or too low, that could mete out your time of year to stop or be extraordinarily wispy. If this happen for a few months within row (and you're not pregnant) you might want to gossip to your doctor going on for getting a different pill.

obgyn question?

I assume its coming. It sounds similar to your bloated. The bring could be that you go on and sour and sometimes weather pattern and the relocate of season will throw it stale track.