Hi everyone
Sorry long post.
Had a terrible time trying to BF my first daughter. Very traumatised by it at the time. We did relactation at 7 weeks and eventually she was off formula completely.
New DS was born on Tuesday evening, all well with him and the birth, save for me being a GBS carrier and there not having been time for IV antibiotics.
We are now home, I have plenty of help around the house and with my DD, now 2.5, but she is being very demanding, wanting to be in DS's presence all the time, bless her. I have spoken to hospital BF supporter, and recieved I think good advice, but finding it hard to trust myself and my instincts, and trying to establish BF with DS extremely stressful again.
He does not really wake to 'demand' feeds, so I am having to wake him to feed him, struggling to latch and gape wide enough (checked for tongue tie, doesn't appear to be a problem), struggling to get him to stay actively feeding when he is on. He has now not pooed since yesterday morning. And just a couple of wees, dry-ish and cracked lips, so I have been giving him formula supplements and EBM supplements where possible as I do not want him to get dehydrated. I am also trying to do skin-to-skin (I do not want to do bed-sharing) and hand expressing after top-ups but finding it totally exhausting. Milk not come in, but it didn't last time until day 5-6? Amount of colostrum I can express is now significantly less than pre- and immediately after the birth. I am a competent hand-expresser after last time's relactation efforts 
Have probably had about 5 hours sleep in total since he was born.
Gotta wake him to try and feed him now, while DP and grandparents wrestle DD in to bed. Can anyone talk me down and tell me what to do succinctly??!!!