Pregnant ??

My period is 3 days late and it is never late I'm 15dpo I'm getting my normal period cramps but no period at all. Could I be pregnant ? Like even tho I'm getting cramps and stuff ? Taking a test in the morning 
On a side note: my s/o and I had unprotected sex on ovulation day. Does anyone have any simmilar story's ? 
( on another side note we are TTC and I'm 23 so I do believe that it's a great age to be trying :for rude commenters! I just wanted to know my chances)