I'm 23 years old, my period is 4 days late. I been getting cramps on and off for the past 2 weeks. I started getting nauseous yesterday. Can I be pregnant?

Are you are having sex? Of course you could be pregnant if yes!

At four days late there is nothing to do now but wait. But if you are sexually active then yes you could be.

Yes I am, should I give it more time before I take a test ?

You could give it another week before testing, but it's also possible these are symptoms of your period about to start.