Need some advice pronto.

Britney
Hey everyone. So i had a baby the end of june. shes almost 3 months old. the last 2 night she has cried to the point of hyperventilating. once after her bath and another our dinner ran late so i knew it was past her bedtime. my question is..is she just over tired? is this okay? she had no fever she finally ate tonight and i feel like cried her self to the point where she fell asleep but i feel like the worst pos parent ever. everything i do doesnt help til shes just over it. and i mean crying screaming. its so sad. i know tonight she was a lil hungry and im guessing tired but i tried to feed her and swaddle swing everything and nothing helped. anyone have advice please?