He fell off the couch

Daniel is OK and so am I, but I felt like such a terrible mommy. It happened a few nights ago. Let me start by saying how incredibly sleep deprived I am (as many of you are, I know). My sleep pattern consists of satying up until DH gets home (around 11:30pm). Then I stay up to spend time with him and usually if I go to bed it's around 12:30 unless I decide to stay up for Danny's 1:00 feeding (which he just gave up 2 days ao). I then nurse him again around 4:00 and then get up at 6:00 to get to work by 7:00/7:30. Well stupidly I decided to throw the gym into the mix and was getting up at 5:00am to get to the gym by 6:00 and so on. So the other night he woke to feed around 12:30/1:00 and I layed down on the couch like I always do. But this time I fell asleep with him on the couch. Then at some point in the wee hours of the morning I heard a THUMP!! My first reaction was that Jacob fell out of bed (he did this the other week), so I sat up and was about to stand when I saw my poor baby laying face down on the hardwood floor nest to the couch. As soon as I picked him up he started to scream. I felt so awful. I nursed him and he calmed down and fell back to sleep and I then placed him in his cradle. So here's the extra awful part... my cat tends to crawl on me which drives me nuts when I'm sleeping and I've tossed her more than once in my sleep. I was so exhausted I had no clue Danny was still sleeping with me and I think I went to turn and felt the weight of him on me and thought it was the cat. I'm pretty sure I pushed him off the couch. That just breaks my heart. It would be one thing if he fell, but the fact that I think I pushed him just has me racking my brain with guilt. Thank god he is OK. I know babies are "made of rubber" but it doesn't mean I want to see him bounce.