early pregnancy symptoms?

Sara • 24, momma to Benjamin 01/20/2018, Baby #2 coming February 2019
My period is 4 days away, I took an 88 cents pregnancy test but it was negative. But for over a week now, I'll get awful heartburn, it goes away but then comes back. Has anyone experienced this before in early pregnancy? Should I wait to see if I miss my period to test again?