Freaking out!!

So my boyfriend and I have sex all the time which I'm not complaining. But about two weeks or so ago the condom broke and he started to freak out. We bought plan b and I took it immediately. Now my period has been late for 2 weeks now and I'm really starting to freak out and I don't know what to do, Im only 20. And I don't know who I to talk to without freaking anyone out.