LATE PERIOD help

Sooo I'm new here! And this may sound a little silly but I tend to freak myself out.
My sort of boyfriend and I finally brought it up from just making out-just Friday night (6 days ago).  I've been expecting my period to come March 26 and it's now 4 days late.  My body has been a bit irregular lately but I'm still freaked out. We didn't have sex but I gave him head and he fingered me and ate me out but I'm nervous that maybe it traveled? Is that possible?
Please help!