I'm worried, I'm sorry if I'm overthinking

Hey, I'm sorry if this isn't the right place to ask this but I'm questioning seeing a doctor about what's happening. (Also I am a trans guy and it's not relevant but yk)

Basically recently my left breast has been feeling strange, I've had what looks like stretch marks appear out of nowhere, which was also around the same time I started get pain there aswell.Touching it or not it's quite painful, my breast feels heavier but I'm not sure if that means anything. The pain is quite bad. I believe there is some swelling but I don't check often so I'm not sure.

Im sorry if I'm overthinking it and wasted your time.Also this isn't happening on the right one at all and im just concerned 

Again I'm sorry if this isn't the right place to ask these questions

Should I go see the doctor or am I being paranoid?