Help. I think I'm pregnant

Keaonna
Hello. My name is Keaonna. I'm 20 and I have been a relationship with my current bf for 6 years. When I was 16 used to have irregular cycles til I started birth control which regulated my cycle. I stopped birth control twice in my life. Once July 2014 and July 2015. I haven't taken it since mid July. I had a period in both July and August, but nothing in September. I knew something was off when I released it was the end of Sept. and I got nothing, no cramps or any sign of my period . I started getting headaches like crazy then I noticed I was always hungry like I could eat every hour and still be hungry. My breast have been hurting so bad, more than usual, and nipple itch. My back has been killing me and I've also gained heartburn, which I've never experience in my life until Sept. Still no sign of my period yet and you see the date. I've taken 3 HPT and got negative. Help pls.