Hi.. my name is herry.I m 22 years old.my last MP date was 18th may 2010 & today is 28 July 2010.and still I don't get my periods.it's a 40 days late periods.& my all tests are negative,I did those tests for 3 times.I am so worried about this.I fill so sick,my body has so many changes like my breast and stomach are expanding,increasing in size,every time moodless.I don't have any stress,I'm just thinking about my periods all the times.I had late periods for 10-15 days before ,but not more then that.But this time it's a 40 days late,and still its not coming. Let me know what are the reasons for that. Help me.

Pregnancy seems the most obvious explanation and those test are supposed to be quite accurate. Have you changed your diet, are you on a crash diet, are you particularly worried about something, all these things can cause such changes in your body. I think you should go see your doctor to be on the safe side.

Have you had a blood test done for pregnancy? As bluerose suggested, see your doctor.

Yes I did the blood test too.but its negative also.and I already see my doctor.and he said that I should have to take birth control pills.but my mind is not allow me to take those pill.I thought that if something bad happened with me because of that pills than? so I don't take those pills.am I doing right or wrong?
My diet is same as it was before.and I don't have any kind of stress.but because of late periods I can't being happy.alll time I am moodles,don't like to do anything.&as if I want to talk with my husband with love,but I can't talk with him nicely.
I don't know what happened with me. Help me.

If the blood test was awhile ago, you may want to see your doctor again for another one. Did he check other things with the blood work besides pregnancy? There could be other hormone issues going on.

Sometimes doctors will prescribe birth control pills to help regulate periods. It may only take a few months to notice a difference. Are you concerned about possible health side effects from the pill? Most of the health concerns you hear about are more likely if you take the pill for a long time, are older, smoke, or have a history of certain health issues, such as a previous blood clot.

Maybe talk to your doctor again and share your concerns with him. He will likely suggest trying the pill for a few months and see if you have a change. The worry you are having over this may be enough stress to be adding to how you are feeling.