Physically - serious sinusitis, I cried like a girly, I literally sobbed with pain!
Followed closely by having my tonsils and half my soft palatte removed six years ago. First of all I was afraid I'd die, then I was afraid I wouldn't. I don't need to have molten hot skewers inserted into my ears an an hourly basis - I already know how that feels!!
Emotionally - realising that lack of contact with my family is a bad deal. When our youngest daughter was born, my parents-in-law said not to ring them if it was past midnight, as they would be in bed (yeah, I know!) Our baby was born at 03.10, so I walked the ten minute walk from the labour room to the paypphones (this was in pre-mobile days) and when I got there, I realised I had no-one to phone to tell them about my daughter's arrival, so I walked all the way back. That hurt. A lot.