Morning sickness?? Maybe??

Ashley • Wife. Mom. Christian. Lover of Nutella and bacon. Amen.
I was up all night last night with a horrible stomach ache and I've had mild heartburn this past week. I have no other signs of being sick, just heartburn and nausea. My period isn't for another week and I took a hpt this morning and had a bfn. Is it possible to have morning sickness before a pfp?? Help! I'm miserable.