Breast feeling heavy during pregnancy

hey mommies, i'm currently at 21 weeks + day 5 of my pregnancy, just got to know my baby's gender on 11 november tht it's a boy so feel really happy + excited for his arrival insyaallah on 30 march ayy hehe 🥰 anyways tht's not the topic today coz like stated my breasts have been feeling really heavy these days not sure when it started while pregnant so just wanted to ask/confirm if it's normal for me to be feeling tht way this early even tho i've google searched about it & it says wht's shown in the pic below, honestly i don't mind feeling the heaviness on my breast coz as long as baby boy's healthy tht's all tht matters to me but sometimes it feels like a struggle to me when i sit up straight to eat or just simply sit straight so wanna know if there's any mommies out there other than me experiencing this tht's all & how can i cope with it 😅❤️🤰🏻