Could i be pregnant

Gabbie
Okay so AF is 10 days late today. My nipples started bothering me last week. But now its only if i touch them. I dont keep up with the color so im not sure if they've darkened. Ive been pretty gassy. And SUPER tired. But ive also just recently started cosmetology school. could these be signs of pregnancy or just due to the changes of exercise do to school?