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
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