Im On My 56th Day Of My Menstrual Cycle Ttc.

im on my 56th day of my menstrual cycle ttc. prior to november i had normal periods every 30 or so days. i didnt have a period in december and i havent had one in February either. ive been taking hpt every week or so and have gotten nothing but negatives. my left breast is lactating, i havent spotted or bled at all since my last period in january. i need some advice on what to do.