Welcome to the forums, congratulations on your new LO and (((hugs))) for the rough start! Tbh I'd try not to worry too much about props at this stage, I was so strict with DS and then DD had most of her naps in the sling until about 3/4mo, by which time she was getting some self settling skills and I don't think the sling harmed her ability to self settle at all in the long run. What it did mean was that she got far better sleep in the early weeks than DS, who seemed to be constantly OT. So really, don't feel you have to do anything with him right now other than get bf established, especially in the light of the rough start. Were you told to feed him every 2-3h around the clock for the first couple of weeks or so after the tongue tie division? That's the advice we were given when DD was 3mo, as you don't want it to heal back to how it was before. So I'm afraid at the moment you will have to wake him so that he doesn't go longer than that between feeds, until that risk reduces - I'm assuming you've had advice on that? Hope you have lots of help on hand?? You need your rest too! (((Hugs)))