FTM here & at my whits end with bf my 10 day old baby aleady.
First 5 days were a real struggle, hand expressed some colostrum in hospital but had to top up with formula as I couldn't get her to latch most of the time & when I did the pain was unbearable 
My milk came in around day 6-7.
The bf helper recommended nipple shields which we are now using although still a little difficulty getting initial latch no where near as bad without & I'm in much less pain.
My main concern is the length of time she takes to feed - I'm feeding for around 1 1/4 hours every 2 - 2 1/2 hours which is absolutely exhausting. In the night she can feed for 2 hours & when I put her down she cries & roots! She seems to be feeding big just comfort suckling because her jaw is moving & she's swallowing but I'm not 100%. She's put weight on & has around 2 pooey nappies & 4-5 wet ones per 24hr,
Why would this be? The nipple shield or low milk supply? Any other reason?
I've been expressing once-twice per day as well just to boost supply. I wondered if it would harm for DH to give her 1 bottle of expressed in the night just to give me a rest?!
I really want to bf but I just dont know if this way is normal! Please help