What does this mean?

Hey guysss,

So! I started feeling period symptoms last week, later than usual but my breasts where and are tender. I then started experiencing cramps like I was starting my period but no blood.

The cramps have stopped now but I’ve still not come on.

I’ve had sex twice, which usually starts my period early if I have sex before the expected start date. But no sign of blood at all either time!

I’ve done a pregnancy test (a cheap one, don’t know it it makes a difference) and it was negative but this is unusual for my body!

What do you guys think/ suggest?