Answers:

I have have my period for nearly a 1 year and have other had extreme cramps and vomiting?

lots of things. anything that isnt right for your body. you should know how to tell-possibly stress, not eating capably enough, drinking disorders, illness.

hope that help.

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Is it okay to change brands of birth control pills after 2 days of taking it?

I agree next to the person ahead of me, that frequent things can cause a missed spell. Number one is pregnancy. Number two is STRESS! I've been behind the months I've had serious stressors surrounded by my life, and the worse it is, the next my period is.

I've read this happen because stress effects our bodies (obviously) and the hormones that are produced suspend the egg from being released, so that we don't procure pregnant in lofty stress situations. This is supposed to prevent us from having a infant at a (from en evolutionary perspective) time when we're not secure.

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