Every month for about 6 months I have period symptoms but no period at all. I even have a stain sometimes but still no period. I am not pregnant and I do not have menopause. What can this be?

I'm not a doctor but, it could be that your period is trying to change its dates and yours may take longer than other females.
Or you may be pregnant or could have something worse wrong.

Since it has been going on for 6 months, it would be wise to see your doctor. Irregular cycles, whether bleeding too often or not bleeding at all, should be checked out.

Thank you for your insight.

I don't know, I'm on the Birth control pill, have been for years, (Cerazette) which stops your periods... But I still get period like symptoms every now and then... You're best going to your GP and explaining how you're feeling.

How old are you? How do you know that you aren't starting menopause? It can start very young.
Extreme athletics and exercise can stop periods.
Iron deficiency can too.

Those are just 3 of the more common reasons.