Normal for my breasts?

I’m 13 I turn 14 in August and I’ve never really had any kind of breasts or never had anything more than a sports bra with no padding in it. This morning I woke up feeling weird and looked in the mirror right before I was getting in the shower and noticed that my boobs were actually growing. I know this seems stupid to be proud of or ask but is this normal for my boobs to be growing this fast? Like I feel like it literally happened overnight