I lift heavy weights .Now i have noticed that my left chest seems a bit bigger and slightly heavy?

I have been doing gym from last 2 years.I have been almost regular.I usually lift heavy weight approx 110 kgs when i m doing bench press,I am 22.n now i have noticed that left chest of mine has grew slightly more and it feels a bit heavy.I m worried now....kindly guide.wht shud i do?