Forgot to buckle baby

I forgot to buckle my 3 month old in. I didn’t realize it till we got to our destination 30 minutes from our house. I feel like I such an idiot idk if she hurt herself. It wasn’t till I stopped the car that she started crying and I went to grab her I took off her blanket and she wasn’t buckled. My heart sank. I can’t stop thinking if she experienced any movement because I hadn’t slowed down as much as a I should have in some train tracks. I feel so stupid about it. I’m such a shit mom. Idk who to talk to about this I just keep thinking how she would be better off with a better mom. I feel so depressed idk what to do. My baby deserves so much more and I’m not good enough to be her mom.