The dangers of falling asleep with baby... I didn't think anything bad could happen to me...

First please no negative words It took a lot for me to share this....It was a normal night we put our 4 week old son Eli to bed at 830pm we then got in bed at 930. It was about 10 when Eli woke up and I picked him up out of bed changed him fed him and I sat in bed with him Like I do pretty often. I leaned back with my back up against the headboard and patted him back to soothe him no different than any other time but this time I fell asleep...now I've fallen asleep like that with him before with no issue so I wasn't super worried about falling asleep this time. At about 10:45 I woke up to Eli screaming he wasn't in my arms... He was on the floor. He had wiggled just enough to roll off my chest... I rushed to pick him up I was instantly in tears instantly hating myself. The bed frame we have there's no way he didn't hit his head i was so worried. I took him to the kitchen turned the lights on there was no blood no scratch no Mark showing he hit his head but I know he had to of. I then made sure I kept him awake for hours...my point of this post is to show that just because co sleeping has been safe and working for you doesn't mean something bad couldn't happen. I'm thanking God that my baby is okay because he easily could of been taken away from me. Be careful mommas love your babies! My husband slept through everything I woke him up telling him what was going on but he keeps trying to tell me I was just having a nightmare and yes it was a nightmare but I wasn't asleep....I'm still sitting here crying hating myself feeling so awful I can't believe this happened to my baby....