Super confused man

Alright so I really don’t know what’s going on man I’m 6 days late for my period did have sex during my fertile window and I didn’t use any type of contraceptive, I had very light pink bleeding and brown bleeding which I blew off as implantation bleeding and have been getting a lot of early pregnancy symptoms I’ve taken multiple pregnancy tests clearblue, first response, equate, you name it I’ve taken it etc... they’ve all came back negative the thing is my mom when she was younger and had all of us she never got a positive urine pregnancy test either I’m just confused on whether I am or I’m not pregnant I can’t really go to the doctor as I’m only 16 but am aware that there are other reasons for missed periods I just have this gut feeling that I am pregnant you know