Help?

I had sex on December 1st (unprotected) and he told me he didn’t pull out. So my period was supposed to come around Christmas December 23rd to be exact. And I haven’t started my period yet. I have been discharging a lot, sore breast, throwing up, SLEEPING ALOT, and sometimes restless. I took 3 pregnancy test. First 1 came (+) and the other two were (-) . I’m not understanding. I can’t make a doctors appointment yet. But can anybody give an idea what’s going on?