I feel like a terrible parent 😩

Ma

Last week my 3 yo has a bin of little puff balls she scoops and plays with. It was on the floor so we picked up all the pieces and went up stairs. While I’m getting dressed I put my 6 month on the floor and let them read a book together. Then I hear she say to her 6 month brother “no you can’t have that” so I look and she’s holding one of the puff balls all wet in her hand 😩 I’m so thankful she she saw it because I swore we got them all and I moved him away the second he started moving towards it. Then today I was was changing my 3 yo clothes and put my baby on the ground. Then during story time he starts coughing terribly and sounds like he was going to vomit but was having a hard time. So I patted his back. He vomited up a small hair tie 😱 I could have died I was so upset! I am a super careful person... like overly so sometimes. I have no idea why this keeps happening 😩😩😩😩 I even checked the area before I put him down because of what happened last week. I just feel so awful 😩