I believe that by 30 weeks I used a nursing bra and I felt way better or try a sports bra.
I've been in nursing bras since the first trimester. My normal bras were perfect fit pre-pregnancy but the second those hormones hit and they became harder and swollen my normal bras would actually make my boobs throb when I took them off which didn't feel healthy. Nursing bras are SO comfy!!! Not pretty and they don't look great under most clothes but honestly sore boobs just aren't it for me at this stage
If youre planning to breastfeed i would wait until your milk comes in after birth. Your boobs will get much bigger so if you buy one now it will likely not fit by the time baby is here. If you dont plan to breastfeed id say youre fine as of now.
i’m 35 weeks almost 36 i started at a DD then went to a G and now i’m growing out of a G but i haven’t got a new one yet🤒 bras are like 50$ a piece which is crazy but honestly if it’s getting to the point your whole boob is going way over then i would buy a new one or switch to nursing/sports bras but under my boobs itch from time to time it could also be the material