Prenatal vitamin and multivitamin?

Olivia • Had our son in April 2016 😍
Is anyone taking a prenatal and a multivitamin? I noticed my prenatal doesn't have calcium or potassium and I am trying to make changes to my diet but tracking my nutrients I am still low in potassium and calcium and wondering if I should also take a multivitamin? 
I just want to get everything right, am just a few weeks in and know that nutrition is not my strong suite.