Period varying?!?!?

HI ALL MY QUESTION IS THAT MY PERIOD WAS 5 DAYS LATE IN DECEMBER AND THEN JANUARY IT WAS TWO DAYS LATE AND IM USUALLY ON A 28 DAY CYCLE AND MY "CALCULATIONS" FROM MY LAST PERIOD WAS A 31 DAY CYCLE BUT FROM DECEMBER TO JANUARY IT WAS A 30 DAY CYCLE...SOOO MY QUESTION IS .....IS MY CYCLE CHANGING DOES YOUR CYCLE DO THIS KIND OF CHANGE AND IS IT NORMAL??
Answers:

What would be a good definition for tender breasts?

It's without fault normal for your cycle to rise and fall. Some months your hormone balance may change and your cycle longer or shorter. If you are under stress (and who isn't?) that can also affect your hormones and down your cycle.

What are the symptoms of pregnancy within the first five days after coitus.?

IT'S NORMAL - STOP FREAKING OUT!

Females only- contraception?

It's clearly normal to be a couple days postponed every month. Sometimes it'll be a little hasty too. It all depends on your personal hormones. The average for a majority of women is 28 days. My cycle have usually been something closer to 32 days. So when it seem like I be a little behind schedule I was if truth be told on schedule.

You're of late a little difference by have a long time in between period than the majority of women. You're unique.

What exercise can i do to preserve my bust small, i gotta brest reduction and they could possibily grow fund?

your hormones may be fluctuating or you may have a slight hormonal in-balance I'd see a gynecologist if your that concerned
I wouldn't verbs about too much
my cycle vary 21 to 23 days most months everyone is different and we all budge through hormonal changes due to stress, food medicine etc.

Does anybody know how natural kinfolk planning works?

Don't worry just about it. You did not give your age so if you are over 40 you can expect it, if underneath 40 your body goes through change all the time, is it possible you are pregnant?

Why length in women,get out of order?

yes it's typical for your cycle to change your cycle date might even adjust too

I heard that going on the pill can generate your breast size increase?

Yes! It is very common. Periods go from between 21 to 34 days. 35 days is medically consider delayed. Usually when you hang around next to the same group of women for extended extent of time (like at school or work ) their time will synchronize.
Why or how only mother outlook knows, but it is observed surrounded by mammals; that females will have their cycle around one and the same time so they can help respectively others in the nurturing of their sour springs.