LO fell off the bed :(

I can’t believe this happened. Had such a long night and didn’t expect to doze off while she was playing next to me on the bed - we do this every morning after her morning bottle. Next thing you know she’s crying and on the floor. Can’t believe I let this happen. She was shaken up but calmed down around 15 seconds after soothing her so doesn’t seem to be in pain. She’s got a red mark on the side of her forehead and end of her eye area. I’ve been trying to put something cold on it to stop it from being swollen and reduce redness. She’s really fought it as it’s obviously uncomfortable so I have only managed a short while on the forehead bit- but the eye- no chance! She’s fine in herself, was playing right afterwards and ate. I’m just in shock I let this happen under my watch and feel like such a rubbish mum. She sleeps in her cot which is why I don’t have any bed barriers. She’s just gone to sleep now (an hour and a half later) . Any suggestions on what to look out for to make sure I’ve not caused any damage to her actual eye? Please be kind, I know It shouldnt have happened and I feel terrible.