Yes. This is normal. Mine did the same thing. They even got a little smaller in the third trimester. Very common.
Mine stopped hurting really early... Like 9 weeks. I'm about 36 weeks now and they just started hurting again. Its normal. I know a few ppl who miscarried and they said that u would know if you are having a miscarriage. But if ur not sure u should talk to ur Dr.
My breasts were really sore until around 20 wks. Now they don't hurt at all and I'm 32 wks. No worries..
Be thankful they stopped hurting. But it's normal. There will also be some discomfort for the first few weeks if you decide to breastfeed.
It's normal for symptoms to start disappearing in your second trimester. Enjoy it because they will come back in the third.