help!

my period is 7 days late (it doesn’t normally do that) and i’m a little concerned... i took a pregnancy test 2 days ago and it was negative... but i haven’t been pmsing at all! my boyfriend of almost 3 years has also expressed that he doesn’t want kids atm and wants me to consider abortion.... but i don’t want one and i think he will probably leave if i am pregnant and would keep it... don’t know what to do