Help!

Marie

So I had sex twice last month and once on July 9th. My period was is kind of irregular in how many days in between but it usually comes. I didn’t get a period last month. I took a test today and it said negative. But I feel so different and I’m experiencing symptoms I’ve never been through before. I was nauseous for over a week straight but having been the past two days. My nipples are darker. My boobs feel heavier and are definitely bigger. I have back pains and dizziness and fatigue during the day but insomnia at night. I’ve been craving chicken a lot. I’m having a blood test done on August 6th. I feel discouraged but has anyone experienced this and still been pregnant?