Hello, I Honestly Think I'm Pregnant. I Have Taken 5

Hello, I honestly think I'm pregnant. I have taken 5 pregnancies test and a 6th one at a pregnancy center all came up negative. I have pretty much every symptom (missed period, nausea, hot flashes, tenderness in my breasts, spotting,bleeding like a period but lighter and shorter, dizziness, tiredness, food cravings, lower abdominal cramps, headaches, lower back pain, rise in body temperature, swelling in my stomack, weight gain, frequent urination, white discharge, sore vagina, lack of breath). Am I pregnant or is it something else?