HELP ME!!

So im 14 and me and my boyfriend always have sex WITH condoms and we recently had sex twice in one day and once a couple days before that, all with condoms, this happened last week and im apparently supposed to get my period now and eve says im 4 days late and my boyfriend is worried im pregnant. 
I do not want a baby at this age and if i am pregnant is there any way i can stop it before it starts growing?