Help need answers !!

Hey I’m new to group! So today I felt bad. I was having hot flashes and Feeling nauseous... So my boyfriend says you might be pregnant & I laughed at him cause we only had sex 2x January 7,9.. & then again on my birthday on 18th of January. We don’t have sex like we used to cause of his job!! But long story short these are the results & it’s looks like he is RIGHT 😳😩... MY QUESTION IS THAT THE APP SAYS I WILL BE 3 weeks tomorrow, but how when my CYCLE START JANUARY 1 & ENDED JANUARY 5th!! But SAYS I GOT PREGNANT JANUARY 3rd and BOYFRIEND ARGUING WITH ME THAT MIGHT NOT BE HIS CHILD.. I ONLY BEEN WITH HIM AND ONLY MAN LAST 5 YEARS .. WE ALREADY GOT DAUGHTER THAT WILL BE 2 IN MARCH... #RAINBOWBABY6