Me And My Boyfriend Were Making Out On My Bed

Me and my boyfriend were making out on my bed and I had loose short on and he put his dick by my vagina for a few seconds (I don't think he cummed) and then ate me out what are my chances of being pregnant by the way this happened a few days ago and I'm not really sure when my periods due I am pretty sure it's sometime around this week and it hasn't come yet that's why I'm worried and if it matters I've never had sex and I'm 14 and have had my period for a little over a year now