Feeling at fault

So today my 18 month old son fell off a somewhat tall cement step and fell off because he decided to jump off and hit the wet grass and scraped his cheek bone area, I feel I could have done more to prevent it but now I feel like the worst mother ever and my mom and husband sure know how to press on my fresh and open wound, also I am not blaming it on my back but its really jacked up, i am soo not in the position to be bending and lifting and doing many sudden movements but a few min ago my husban told me how is it possible my son has soo many little accidents with me and that we should just hire a baby sitter for him instead 😢😢😢😢😫😫😫 he hardly ever spends enough time with him and when he does he quickly hands my son over to my Mother in law and goes off to his video game world, do I deserve this? Is this my karma getting at me for my sons falls and crys?