Am I possibly pregnant ?

So my bf and I had multiple sex, all using with condom ++ he pulls out before he ejaculates. We’re also using water-based lube if that makes sense.

After sex, we always put water on the condom to check if it leaks. Now my period has been 6 days late now according this app. I got my period last March 10-17, had spotting last March 28 (lasted for about 3-4 days) and I still haven’t got my period today.

What could possibly be the reason of my late period?