Am I pregnant?? Two negative but one positive?!?

Okk I had on sept 18th an the condom broke & he came inside of me. I don't keep track of my period so idk when I was supposed to have it but according to past months I wanna say it was supposed to be sometime around the 25th? On the twentyth I bleed really lightly and darkly for about 4 days and the next Sunday I had a little spot of blood in my panties... I threw up two times and up until yesterday had ALOT of discharge (mostly clear/ sticky) when I wiped and my I feel have gotten bigger and are occasionally sore. I took a home test wednesday night , but only saw a negative after about two minutes so I put it in my bag but yesterday morning when I took it out it was a positive! It wasn't completely bold but was definately really notecable. This morning I took two more expensive home tests & both were negative ); what do you think?!