Recovery Rebate Credit with change in filing status

Hi, I am recently divorced (in December 2021) and will be filing HoH (with 3 kids) for 2021.  While married, my husband and I never received any stimulus payments due to our combined income being over the eligibility threshold.  When completing my taxes in TurboTax, I answered that I had not received any stimulus payments and now I'm getting a huge refund due to my sudden eligibility for this Recovery Rebate Credit.  I'm just confused - since I wasn't eligible at the time that the payments were made (i.e. March 2021), how can I receive this benefit now?  Does this seem correct?  Hope I'm explaining this clearly - I'm just freaking out at getting a massive refund unexpectedly. Thanks!