late period

hi I’m 16 and my mom keeps trying to freak me out because my period is two days late. this hasn’t happened in a while because my first period was 3 years ago.

she thinks I got something because last month I went in a hot tub which I guess is unsanitary.

realistic possible things that made my period late:

- I just got a gym membership and started working out (I was completely out of shape and haven’t worked out like that in months)

- I flew somewhere so I know that going in an airplane can fuck with your period.

- I’ve been under some stress because my boyfriend has been driving me crazy lately.

my mom is convinced that both of things can only make your period come earlier. I know that it could probably go either way.... right?

also - no, I haven’t had sex.