Lower breast??!!??

Valerie • married and ttc 7years 💏 1angel baby🌈 1blocked tube🥀
I feel a bit nervous. I was looking at my breast in the mirror and I notice that my right breast is lower than my left about am inch, it is usually not a huge difference. I'm kind of scared, has anyone else experienced anything like this...please help..or what do you think could be the cause.