What if i'm pregnant and why doesn't he care?

I've been with my boyfriend for nearly 2 years and we're completely in love but we're not ready for a child.Recently,we'd been having fights,and one night during a drunken party,i had a bit too much to drown my sorrows and my boyfriend and i had unprotected .I regretted it immediately afterwards,and we got the morning after pill the next day.My period is now 3 days late.I've been carrying on as normal,because i dont know what else to do,when really,im terrified.My boyfriend is talking about 'stressful band recordings' and his 'nerve-wracking football game' and it upsets me,as if he's not even worried about it,when im more stressed about it than anything.He says he's there whenever i need him,and just keeps saying he hopes im ok,but why isnt he more worried about this,i feel it's as much his responsibility as it is mine?