Medicaid question

Is anyone on Medicaid? I have Medicaid for my daughter and I went to get a prescription for her and they said in order for Medicaid to cover her medication I need her insurance card. So I had to pay $30 for her medicine because I didn’t have a card. I went to the office and they said that I won’t get a card? I’m so confused right now🤦🏼‍♀️ how do I get proof of her insurance? Her doctor needs it too. She’s only 3 months old so I thought maybe it took a little while longer to get a card but I don’t know.