Hi I Am Expecting My January 2017 Montly Flow On

Hi
I am expecting my January 2017 montly flow on 22nd January but it did not come.
Today is 23rd January. I am expecting it to come.
On 21st January, my boyfriend and I had little fun on bed but what happened was HE GAVE ME A FINGER AND ABOUT AFTER THREE MINUTES i only gave him the blow job which he ejaculated some precum. It was oral.i pulled out some seconds before he ejaculated. Nothing, absolutely nothing entered my mouth. AFTER he ejculated, nothing happened. I was in clothes and he too. He did not get around my vaginal area after i finished with him. And besides i know one cannot pregrant if sperm is swallowed through the mouth. So just because i made him come, i have been disturbed that is why i can't see my monthly flow because i feel like maybe the sperm however it travelled, got to where the egg is. Also i read that if you had not had sex and your period is delayed, it may be due to emotional anger, hormonal changes and other factors. Last week we got into a really serious grudge which left me emotionally angry. So am i pregnant from not even swallowing any precum or my montly flow is delayed because of the factors i think i read about? please Help!