Natural ways to get my period started

Leticia
So, I'm on cycle day 55. I'm usually a 26-27 day cycle person with few exceptions. Tested throughout - all BFN's so I'm not pregnant. I was just wondering if anyone has heard of and / or tried anything natural to get your periods started again. I read eating celery and fenugreek may help. Anything else? If I don't start naturally in 3 months my doctor said she give me something to make me start again but it wouldn't be too pleasant.