I'm 23 and 11 weeks one day
You're fine. If you are under 20 you actually need more calcium than someone who's over 20 during pregnancy... The main concern with too much calcium is calcium inhibits iron absorption so too much can lead to anemia. If you take prenatals with iron try to take them either an hour before or two hours after consuming larger quantities of dairy products. (Its okay to take them with calcium fortified orange juice)