Kris i know others have said it but you are not alone. My DD1 is 20 months too and DD2 is 18days old. I am struggling too and have been in tears most days over silly things. My DD1 seemed to be coping very well the 1st week but the last few days have been a nightmare, i think cos DH went back to work. I too feel guilty and dont want to lose her (i feel like i am) All she wants is my attention and i jsut want to give it to her but am finding it very hard juggling my time between a nb and her. I have a sling but DD2 will not settle in it and just wants to be held and cuddled which is upsetting to DD1. I have no advice but a big just so you know i hear you. I hope in the coming weeks like others have said it will become easier.