Am I going crazy

Is it crazy that when I watch moms video of there babies that had passed (RIP 👼) like of SIDS or positional asphyxia, I get scared so I freak out about the way my baby sleep and is it safe enough for her she’s my second but I freak out she sleeps in the crib with in it but I get so nervous during the night. I also get scared if her nose stuffed up or something is that bad. Should I just relax and stop being so scared!! I don’t want nothing to happen to my baby???