Didn’t realize my newborn was favoring one side his right and went to pediatrician at his 5 wk appt

We noticed a small protruding bump right side temple. And flat spot. She referred us to head shape clinic for children… he has tortocollis which means he favors that side and it shows through flat spot and head as well as now realizing he always sleeps on that side and looks towards that side. We’ve been doing exercises on him and have a pt evaluation coming up. In June I guess since he is still too small they will evaluate his head to see if it got better or further action needs to God forbid take place… helmet if needed, X-rays etc… I feel terrible…. I don’t want my baby to have a helmet thinking positive. We got him this babymoov love nest pillow that contours and supposedly helps shape baby’s head to be round of dealing with tortocollis and flat spots. First baby. Feel like I failed. Beating myself up about it questioned if I held him enough did I have him laying too much, why didn’t I realize he was favoring one side?? If anyone has input advice or has experienced this please let me know. Thanks.