Pregnant or nah?

My husband and I have been having unprotected sex for a couple months now-I was supposed to have my period the 28th of September because that’s my usual and I haven’t really missed a period and if I did it’s only like 3 days- now I’m 17 days past when I was supposed to have my period and I took one test after 6 days late and it was negative- Is there still a possibility I could be pregnant???? I have no symptoms just slight cramping sometimes. (Keep in mind I just traveled to another country for 2 weeks now)