I had unprotected sex about 2 and a half weeks ago. My period is due on the 7th of January and I got unusual light bleeding on the 6th of January right before my period is suppose to start. I only noticed it when I wiped myself. It didn't leak or anything like that. I'm not sure if it is spotting or not, I've never experienced that before. Can I be pregnant ?

Best to do the urine test

Yes you may be, but it is far too early to do a pregnancy test yet.

You need to first be sure you are missing your period and you can not test till at least 10 and normally 14 days after you miss the period.

So wait two more weeks, then test with the first urine of the morning as soon as you wake up