Women's Health

So as of late I've had very irregular periods.

For around three months, I've been getting my period every two weeks. So one week of being on my period, one week of being off, one week on, one week off. I thought the problem would fix itself, that I was just being irregular but if I let nature take it's course, I'd be fine and regular soon enough--so I didn't do anything about it. But by the time I had my 5th period in a 3 month span, I decided to start taking my birth control (Microgestin) again.

I was prescribed this a few years ago to regulate my periods, and it did the trick. I took it for almost a year, and I've been off it for a year now (until the beginning of this month). However, I've been on Microgestin for a month now, and my period still comes every other week. ALSO, my most recent cycle has been going on for ten days now.

I saw a doctor last friday who did nothing but tell me I wasn't pregnant nor anemic at the time, but when I went in for my appointment, I hadn't been bleeding for more than seven days (as I am now). I'm trying to schedule an appointment with an OB/GYN asap, but I don't think anyone can see my until monday or tuesday (and by then, I'll have been bleeding for 14 days straight). I don't know what to do at this point. With 5 irregularly recent periods preceding this extra long one, I'm worried that I'll become anemic or suffer other health problems.

Has anyone experienced this before? What was the cause? Do I have cysts/polyps? Is it more serious? Is there anything I can do to stop my current period (though it's light and spotty, it just keeps going!) I'm just looking for answers of any kind. I'm very worried.