That is exactly my situation. I didn't get any news on my refund until last week after 4 months. Birth last year, #6. Got the stimulus for everyone else, claimed the recovery rebate for the baby and it was rejected, but got the child tax credit for all my children including the new baby. I have tried calling the last two days, but at the end of entering in all the info I get "due to the call volume in your topic we cannot take your call, please call back tomorrow or the next business day..." I plan on getting into the routine of calling once per day.
On a positive note, it looks like in addition to my partial refund deposited, the third stimulus (EIP3) for the baby was deposited shortly after the refund.
