Question !!

Im not sure what's going on . I've missed one period , my breast are super sore , I am nauseous almost all day and have been throwing up as soon as I wake up , sometimes more . 
I took one hpt about a week and a half ago and it was negative . But I'm still experiencing these symptoms . With my moms last pregnancy she didn't find out she was pregnant until she was 15 weeks because hpt were coming up negative and she had to get a blood test . 
I don't know if my body is just being weird or if I'm pregnant ? 
I need advice !