Implantation bleeding or period?

Dulce • 35 yrs old.Love baking
So i have sex with my bf last week and i was ovulating (thats what my app says) and we use condom once also we dont and then other day we dont and we use the withdrawal method also condom so please dont judge, my question is today i saw this little clear brown thing in my underwear when i go to the bathroom and i think to myself omg it came days earlier but then i think about implantation bleeding that occurs 6 to 12 days after the relation and i have 7 days im so confuse, my boobs are hurting me so much i feel they are huge right now, im i crazy?