Normal?

So I just got off my period like two days ago and since yesterday and also today my boobs have been hurting so much I am a B cup not that, that matters I’m only 18, they are not tender it’s not the nipple it’s the whole boob and both of them what could this be? Are they growing ? Or it a just normally pains after period even though this happens sometimes to me I don’t understand why it hurts anyone else ? It’s not a stinging feeling more like sore or growing I guess?