Help!!! Only 15 and in need of answers

Ok i had sex on may 10th, about 2days after my period. The condom broke. About 2 weeks later and still to this very day, 6/11, i’ve had back shoulder and even stronger lower back pains. My appetite goes up and down, im always tired and dont feel like doing anything i normally do. I just want to sleep all day. Ive had to go to the bathroom more often also. I almost threw up at 3am like last week and somedays at random times ill feel sick and quesy. My breasts dont hurt however. Well anyway i missed my period this week so i went to clinic and they ran a PT. The result was negative. I was just wondering if i should retest next week or leave it alone and not worry about it because ive heard so many stories about false negatives. Is there still a chance? Or is everything just in my head? Please help? Im only 15 and in desperate need of answers before i tell my mother.