I'm almost 26weeks, and I'm hoping its normal! Mine have been hard since about 23weeks. And I'm getting a few stretch marks, only on my boobs. Some people start leaking milk around this time too. But so far mine are just very round and hard. I think its normal
I'm also 23 weeks but I haven't experienced hard breasts yet. They are still very tender and sensitive. Im not sure if that is normal or not