Be patient.  That's how the system works these days.  

" If you filed electronically and received an acknowledgement, you do not need to take any further action other than promptly responding to any requests for information. If you filed on paper, check Where’s my refund? If it tells you we have received your return or are processing or reviewing it, we are processing your return, but it may be under review. We’re working hard to get through the backlog. Please don’t file a second tax return or contact the IRS about the status of your return."

https://www.irs.gov/newsroom/irs-operations-during-covid-19-mission-critical-functions-continue