Filed in January. Still processing

filed at the end of January like I do every year. Absolutely no changes from the previous year which I saw my return about 3 weeks later. I understand with all the covid stuff it being delayed some but it has been 5 months now and it still says still processing. Is there a way to check and see if I somehow did something wrong? When I got ahold of an actual person at the IRS all they did was use the "wheres my refund tool" to tell me it's being processed. Will the "wheres my refund tool" tell me if there is something wrong with my return?