Am I pregnant?

Okay so last month my period was 5 days late and when I did get my period, it was only spotting for its duration, this month I have ALL THE SYMPTOMS of being pregnant (says my boyfriend) he says I'm moody, gaining a little weight in my lower belly, my areolas have darkened a little bit (but they're not like a dark brown?), I have been so exhausted all the time lately like even little tasks make me so feel so drained and I have to push myself to do anything so fatigue I guess(?), my breasts were quite tender but that stopped, the common nausea but no throwing up (other then the fact that I have acid reflex), frequent urination BUT I took a pregnancy test the day I started spotting this month! It says negative so I really am not understanding! I spoke with a coworker and she said he first pregnancy when she tested it said negative so I am just so confused if I am of I'm not... Need input! Thankyouuu!