Help ‼️ not sure if pregnant

Hello! I've been losing my mind these passed days trying to figure out if this is all in my head or if I just MIGHT be pregnant. I had my period this month starting on the 10th and ending on the 13th I had unprotected sex the 14th and 15th.. one day before my fertile window according to my period tracker. Today is when I ovulate. I've been having symptoms since this Friday.. I've been feeling very tired, nauseous & dizzy sometimes as if I was gonna faint. I feel so full & bloated even when I don't eat & I've also been extremely thirsty. I took a test yesterday and it came out negative. I feel like it's too soon to be feeling anything and too soon to be testing but I'm so anxious to know