Hello, I am a 21 year old female, I have been having stomach pains for the past couple weeks. My symptoms include, stomach pains, dizziness, nausea, constant head aches, and my breasts have been sore. I stopped taking my birth control about 5 months ago and I am a couple weeks late. I did take a pregnancy test and it came up negative. I am really getting irritated with my body. I was wondering if you could give me any insight about what might be going one with my body.