It's just getting so hard, to the point I'm getting upset and teary now, I'm worrying about nights and all the lack of sleep is seriously affecting my 3yo and the time /patience /effort I can put into time with her.
My DS 19 weeks has never been great at sleeping but I he has had the odd week of doing 4-5 hours at night, and still does the odd one every so often.
Days are rubbish, he wakes up about 8am feeds and is awake till about 10 when he will have 30 mins max. This is generally always in my arms or in my bed. He's happy then till about dinner. He will then BF/fall asleep on me/ be carefully put down immediately wake scream, then the cycle starts again. The only way he will sleep is in my arms.
Nights are pretty much the sane. Don't put him down till 10, if I did I'd just spend all night in nursery.. Dread 10pm as I know it could be hours before I get to bed. I feed, I put in cot, he wakes if not immediately then within 5 mins. Last night was 02.30 before I slept, actually had a little cry knowing I had to be up at 6am with toddler. Not that 2.30am was him settled for night he was up at 4 and 6.
I tried everything to get him down, dummies, formula, swaddling, comfort you. He only wants me and I'm running out of steam. 
Please please is there anyone that can help???