Period no blood ?

So my boyfriend and I have be having a lot of sex this past week. It was unprotected and pull out. We are both very young he just finished high school and I'm on my 2nd last year of high school. My period is late as in there is no blood but I have cramps and other symptoms of being on my period. I'm stressing out a lot cause of it and my boyfriend said that I am on my period just no blood. I can only take a test next week when I get back home and I am with him. Is it possible that he is right ?