Could I be pregnant

Period a few days late last period this month glow said id start the 23 I started today the 22 the past week my nipples have been really sore an I was kinda cramping so I took a HPT last night it was negitive like I said I started today an now im cramping moren than usually an nipples still veey sore could I be pregnant even since it was negitive last night?? Please help