I had protected sex with my boyfriend and everything went as usual and nothing different happend and it says my period is late on here but I'm not sure if it really is or not because I didn't mark my last months correctly I think, and I can't remember the day my last one ended, we were protected so I don't know what's going on,  I keep having symptoms that my period is coming but I haven't gotten it yet. Is this normal? I'm kind of scared