Confused

Rose

I have got 3 apps on my phone for my period

1 app telling me I am 9days late

2 app telling me I am 7days late

3 app telling me I am 2days late

Dunno which one to believe and I am bloated alot and having a few cramps but not a lot and feeling sick

My breast are killing me and my back to so i really dont know what to do