helppp

so i have unprotected sex about 15 days ago i’ve been having mild cramps for like 2 mins or less i have shocking pains in my boobs and at first i was feeling reallyyyt hungry in the mornings now i’m fine but a night i feel like i’m going to throw up everywhere and it’s been like this for about 3 days, i texted on day like 4 got a negative but i was told that was too early, i wanna test so bad but i just don’t want to see negative,i feel like i have to throw up it feels like it’s stuck in my throat it feels horrible! any ladies experienced this and was pregnant?