My period started on November 28th and ended on the 3rd of December and had unprotected sex on the 9th,last week I was bloated and cramping really bad but haven't started my period yet and on the 28th of December (wednesday) I went to the clinic for a pregnancy test and they said it was negative for now and it's now the 2nd of January and I still haven't had my period yet, is that late? Could I be pregnant?

They said that it is negative for now. You have been testing way too early to get a definitive answer. You can test again now, and if you have doubts, wait for another week, and test again. If the test is still negative but your period has not started, you may want to see a doctor for confirmation of your result.