Carmen, what you are feeling is very, very normal. I felt the same way when DS was born. DD was such an easy going, placid kid and although we didn't have any issues with jealousy etc, she did start waking at night and having disrupted sleep. The good news is it WILL PASS. It's an adjustment period for everyone. Keep your chin up and ride it out - I know it's hard, I'm about to do it again with a smaller age gap this time and I admit I'm a bit scared! I swore when DS was a newborn that I wouldn't have any more. But things get easier and life returns to 'normal' (or a new sort of normal) and when that happens, you will get your confidence back.

Hang in there, you're doing a great job!!