Pregnant or PMS??

I had sex around the time my calendar says that I ovulated. He came in me because he "forgot he didn't have a condom on" i took plan b and a week later (when my period was suppose to be due) had spotting for 6 days (which isn't normal for me at all). I took a pregnancy test the one with + or - and the - was very faint so I'm not sure that the test worked properly. It has been about 2 weeks since the spotting and my boobs hurt so I squeezed them and liquid came out. I have been feeling extremely dizzy and sick to my stomach with a head ache lately. Could it be just PMS? My next period is due next week. Advice and nice comments would be great thank you!:)