Upper back pain?

Kayla • Pregnant with my rainbow baby! Baby#1🖤🤞🙌🤱🤰🌈 September, 2019!✨🌟🍁🌎

Hi ladies! I just found out that I am 6 weeks pregnant. And before my pregnancy I had/have really bad posture, I slouch very bad. But since being pregnant I’ve noticed that my upper back hurts between shoulder blades. I had back aches before, but not right there. Could this be from my boobs being bigger? Anyone had this problem?