I have always had a regular cycle since I started my period. I missed my cycle in September as well as October. I took two home pregnancy test which were negative. I also went to the doctor and had a blood test done which came back negative as well. Last week I had very light spotting for 2 days with mild cramps but no full cycle.I have had a few signs of pregnancy such as weight gain, fatigue, headaches, and backaches.I don't what should I do next... any advice?

I would go back to your doctor and have them help you determine why you are not getting your period. I'm guessing it's not pregnancy- blood tests tend to be highly accurate. It's not impossible, but it's highly unlikely that you are pregnant after a negative blood test at this point.

Go back to the doctor for follow up to determine what other issues you may have that is causing this.

Could it be that the blood test was done too early?.