Hes denying the pregnancy ...

So ive been seeing and old high school flimg and things were actually getting serious until we had a small argument and i was temporarily blocked.. i was going to just let the situation go till i jist recentlymissed my period. Now hes denying i got pregnant claimingi must have been still dealing with my bd . Theres no possibilityof that. When i looked back on my calendar this month i didnt kno i had ovulated around the time of our hooking up. Now two weeks later i missed my period. But hes claiming it cant be his he pulled out and its too soon ro kno. (Hes never had a kid b4) this will be my 4th child so i knew soon as i missed my period. Can ya look at my calander and make sure yall see the same thing i see. He wants a dna test