What should I do ?

I’m 14 days late. I never had sex, but after giving my boyfriend a blow job about 3 or 4 weeks ago he ate me out and then kinda fingered me. He said nothing was on his fingers or anything. I’m just scared that somehow stuff got on me. I took a test when I was like 3 or 4 days late and it was negative. Is it possible I could be pregnant? I don’t feel any different or have an period symptoms. My periods are irregular.