two days late

I had sex for the first time on Nov 8 without protection then I kept having sex here and there wiithout protection my period was due two days ago and I haven't gotten it and I just had sex yesterday without a condom but I don't think he came in me ... but I feel nausea and headaches and really really emotional and really sleepy... someone help? 
Do you think I'm pregnant ? 
Or to early?