what’s going on??

So starting two days ago I have been feeling weird. Kinda outta whack you know like bloated and eating a lot but b i like food i didn’t think anything of it but then I had heart burn for the first time ever. I’m only 19 years old so i asked my mom what heart burn was and she said exactly what i described was heart burn so then i was like i can’t be pregnant I have had period since i last had sex but this last period that i had was waaaaay shorter than i have ever had. I took a pregnancy test and it said negative but i feel weird and i don’t know what’s going on with me. I don’t want to really go to the doctor cuz nothing is really wrong with me i just feel weird but....what do i do????