HELPP ME OUT LADIES

I am 1 week late amd according to the app i was supposed to get my period on the July 9th and till now i don't have it. My last period was June 8-11, i travelled outside the country last May 19-June 19. I've been feeling kinda weird on my lower abdomen and i've been just dry and no discharge at all. Yesterday i took PT and it was negative. Am i just late or can this be early pregnancy? HELPPP ME OUUUUTT