When I was pregnant with my daughter 4 years ago, I started to have heart burn (never once had it in my WHOLE life!) but I didn't start having it till I was about 6 months....just got my nexplanon taken out Sept 17 this year, we are trying for our 2nd....i have been having heartburn non stop for about 2-3 1/2weeks?? It just so happened to start a bit after i got off birth control. I am very athletic and workout everyday, i haven't been as strict on my diet like i have been the past few months. I've taken pregnancy test and they are all negative. Could I be pregnant? Or a diet change be it? I just never never ever have heartburn only reason why I think I could be pregnant & it's just too early for the test to tell?