sore boobs

Jj
Ok....so I am 25 years old and not once in my lifetime have my boobs ever burned or "swell" kinda like a water balloon full swollen or painful in general right before a period. I also had sever pelvic/back pain about a week or so ago.
I took a test yesterday it was neg 😔 however I'm still 6 days early for my period to start. 
 
Anyone think this could be a pregnancy sign? I have two kiddos. But my youngest is 5 I remember my boobs hurting with my oldest but I don't remember all side effects.