Hi ... I understand your concern . It is good that u are aware of all this . If the baby is doing well right now , then it is ok. But keep an eye on abnormal central nervous symptoms like multiple vomiting or irritable cry which is not consolable after feeding and colic pain meds. It is quite unlikely that the baby is in any harm .
Next Steps
I m glad that u r aware about shaken baby syndrome. Please spread the awareness among your friends group and relatives. It looks normal but might have bad consequences.
Health Tips
Keep your nutrition up to date with good amount of fruits and dry fruits . It will help u and your baby as they contain good amount of vitamins and other micronutrients. All the best with your motherhood