Sorry if TMI

So I’m 17w3d today, and for the past week I keep getting this weird and intense tingling feeling in my nipples and they get all hard out of no where, almost like I just stuck them in ice. It started as just maybe once every day or 2 but now it happens like 10 times a day. Is this because my milk is starting to come in? Is it normal? FTM here so this is all new to me