BFN!! No Af

Queen

I'm so irritated! I'm 3 days late and I gotten 3 negatives. I'm confused as to what is happening. I ovulated on 6/28/18. we had sex during that 5day fertile window.i had cramping at 5dpo

I made an appointment for a blood test. I have no signs of Af no spotting no cramping. I started gaining weight about 1 week ago. could I be pregnant or is my body playing tricks on me. any thoughts???