Could I still be pregnant?!

Dani • Mommy to a beautiful toddler ❤️

My period is suppose to come in 5 days. I bought the first response (6 days before missed period) test and it was negative tonight :(

My boobs this past week have been soooo sore!! And I've been feeling almost a "let down" feeling, which I haven't felt since I was breastfeeding my son.

Could I still be pregnant?