help!

Klarissa

I've had some abdominal cramping since Sunday, I'm walking up with morning sickness, I'm also bloated and feel pregnant. I don't want to symptom spot but I'm going crazy. I'm four days away from AF and all test come back negative. Does anyone have similar symptoms. I also look an OPK and it looked positive.. could I ovulate so late? I'm on cycle day 28.