Helppppp!!!!!

Ok, so i got my last period on the 25th of June and it ended the 29th of June. On the 18th of July I hung out with this guy and the two of us made out and he ate me out. I’m a virgin and he went to stick his dick in me and had barely stuck the head in when I told him no. I am on no form of birth control and it currently has been a month since my period and I’ve been having all of my normal period symptoms aka tender breasts, bloating/weight gain, moodiness and irritability. I’m wondering if these are signs of pregnancy or that my period is late because of stress, poor diet, lack of exercise, or it having been thrown off by another family member. I took a pregnancy test on the 26th and it was negative, but was this because it was too early? I’m extremely stressed out because I feel as though this is very unlikely but with my luck I feel as though it’s a strong possibility. Please help. l am also posting a this in several groups. And please don’t make me feel stupid ( I already do posting this)