Yes when we are prego our baby takes alot of our nutrients. So it is very common that you had problems. Talk to your Doctor and take extra calcium on top of your pre-natal pills if you take those, which hopefully you are, alot of people don't know they should start those months before you are trying to concieve

lol
If you can maybe do regular dentist appointments maybe instead of twice a year go 3-4 times while prego and a couple times after so they can be watched.
Good luck, best of wishes!
Chatty8484