Doctor or no?

We'll... 
​I'm 17.. And I've been having weird issues lately... I've noticed symptoms of breast cancer but I didn't really want to tell my mom or anyone because I didn't want to scare the poop out of her if it wasn't needed to. 
​I also don't want to have to tell her I'm active If you know what I mean... I really regret giving it up to my boyfriend but... That's in the past... Anyways I noticed....
​A red dot on my breast 
​That breast is also bigger 
​Bloody discharge (not just blood like I can see it through the clear stuff..gross) 
​I'm really nervous about this.. I just want to know of this happened to anyone else? What did you do? Should I go see a doctor? Is it worth telling my mom? Thank you!