Baby scared me :/

So my bb is 8 weeks old and breastfeed. She spit a lot but today milk came out of her nose and she could not breath for a few seconds like maybe 3. I got so scared, but thanks God I was holding her and was able to help her. I pad her back and suction her nose. I am still scared and now don’t want to let her sleep by her self. Have this happen to anybody? Maybe I am

Overreacting but This is my 3rd bb and this never happened before :/