Tubes tied, cut and burned 8 years ago. now 65 days late..

Hello ladies,
I am going to be 30 years old in April. I have 3 kids... ages 11, 9, and 8... So 8 years ago I had my tubes cut, burned, and tied. Today is 2/25/15 and The first day of my last period was 12/23/14.. it is now 65 days since the first day of my last period. I did 2 hpt and they were both negative. But I bought them for one dollar each. I also had a test at planned parenthood and it was negative. And then I had another one at my doctors office... negative! When I expected my period in January I had spotting. But no period. I was nauseous, I had two dizzy spells, breast wasn't that sore, visited the bathroom a lot. When planned parenthood said it's negative they said I might be stressed. Well this isn't the first time in my life that I have been stressed. It's happened plenty of times. And I have always been regular. After my last child, I have bad cramps on my monthly. Before him, I never really had cramps. So I'm going to take blood test. I don't know what to think.. it's bothering my mind. Oh after planned parenthood told me is negative, I stopped having symptoms, but I still felt my breast, and still no period.