Scared this could be cancer...

I am a 21 y.o female. A few days ago I noticed that my right nipple was itching. When I looked at it a noticed what could have been a small pimple ; so I tried to pop it and as expected white stuff and a little blood came out. The next day there was still a bump there that still itched, the difference was now it looked like it has a layer of dry skin on and around the bump. Two days have passed and two more bumps have appeared. One underneath my right breast and the other fair close to my nipple. Google has me thinking it's cancer. I dont know. I have an appointment with my Gyno but I can't keep racking my brain until then. Please help give me peace of mind.