Are in that any side effects of taking birth control for long periods of time, similar to until you start menopause?

I'm 24 now.
Answers:

How do you gain rid of too much water contained by the body?

Most definitely!

Your colloquial hormones will be totally screwed up.
You will have lower libido.
You may hold estrogen dominance symptoms, like fibroids and endometriosis.
Birth control will deplete your body of vitamins and minerals.

Look up the synthetic hormone in your birth control. You will find tons of side effects.

Also, read these articles...
http://www.nexusmagazine.com/articles/yo...
http://www.nexusmagazine.com/articles/pu...

Y is this occurring to me?

Less chance of ovarian cancer and cancer of the endometrium.

The risk of blood clots etc walk up after 35, doctors won't prescribe the pill to women over 35 who smoke, for that reason.

Does it hurt really impossible when a female have sex for the first time?

I took birth control pills for 15 continuous years without any problem. Came sour them to get pregnant (within a month!) and be unable to pinch them again after my son was born. I have all the unpleasant side effects along beside the fact that my hormone level actually dropped to nought while taking a combination estrogen/progesterone pill (the most common kind). I be 33 when I came bad them. That was 10 years ago and I enjoy not been competent to take them for any extended length of time since then.
I do not agree that they mete out cancer of any kind. They own been scientifically proven to backing with ovarian cancer. Hope this help.