Late Late Late (help pls)

Arianna

So I'm 4 days late. I've been having the typical period symptoms but no period. Took a test and it came out negative. I've been under A LOT of stress lately from school, mostly due to injuring my hand and not being able to do work like I want to. My boyfriend keeps telling me my stress is throwing my period off (we've have sex it the last 2 weekend's and nothing 'happened')

So... am I just super stressing myself?