When is the right time to take a pregnancy test ?

My last period was June 21-26. This app says I am 4 days late & another app I use says 6 . I’ve had sex 6 days after my period when I was supposed to be ovulating which was July 3rd . Also did on the 9th & 17th . I’ve taken 2 preg test yesterday & they were negative but I still don’t have a period. I’ve been stressed & having anxiety over the thought of being pregnant but Idk if I was stressing myself that much to be this late or miss my period for this month. Then last night I had a dream when I took those test they were positive but in reality they were negative even put a flash light on it lol I’ve taken preg test before so yea ik it was negative for sure. The anxiety is real help 😩