pull out method, plan b, late period

I started my last menstrual period on MAY 19, 2008, my period is usually VERY regular and 28 days.

on the weekend of JUNE 7TH, 8, 9TH i had unprotected sex with my boyfriend using the pull out method 4 times (yes i know it doesn't always work) we've been together almost 2 years and have used this method before and it's been fine. we usually use condoms and are usually responsible, but we just got mixed up

based on my cycle, i should have been ovulating between MAY 31 - JUNE 4TH (i believe?), based on my cervical mucus around that time, i was ovulating.

i was worried about the unprotected sex so at 7:30pm on JUNE 9TH, i took my first PLAN B tablet. then i took the 2nd tablet on JUNE 10TH at 7:30am. i had harsh side effects of plan b for a few days last week: headache (i get migraines, i am very sensitive to hormones) and sick to my stomach and bad anxiety (which i have anyways but it made it A LOT worse,) i also noticed i had a slight fever.

anyways, i was supposed to get my period on JUNE 16, and am 3 days late and FREAKING OUT! i'm very scared, too scared to take a pregnancy test just yet.

i started getting my normal PMS signs on JUNE 13TH (it started off w/ the normal mood swings: happiness, bitterness, yelling at the bf and cravings and now i have brest pain which sometimes i get up to a week b4 i start my period) and still don't have my period.

i am very worried. something simular happened to me back in december of 2007 where i was 1-2 weeks late with the same stress and symptoms i am experiencing now (except last time i did not take plan b after unprotected sex - but did induce my period by drinking parsley tea and it came a few days later)

i've read a few places that plan b cannot make your period late, just early and other places said it can.

i've also been stressed more then usual this month. my job assignment ended and am stressing about finding a new one and a lot of other personal things in my life and am course stressing about this.

i've just come here for support and opinions. i honestly am tooo worried to take a pregnancy test (unless of course i get more symptoms and am still late in a week or so) so please don't suggest that

thank you very much in advance