Hi,

Take a big breath! This is one of the common hurdles in the early days and is by no means a showstopper! Many of us have been for driving lessons, done the test, and still manage to wipe out the letterbox in one of our first excursions with the new P-plates on - you will get over this. We rarely decide we will never drive again because of that one encounter with the gatepost.
Babies are so small and their systems so immature that they go up and down very easily. Sometimes babies are a bit jaundiced, which makes them sleepy and disorganised, or still getting over the birth.
OK - now is not a time to worry about the nipple shields, so if you have stopped using them and that's the reason why your baby won't attach, get them back again - they can be sorted out another time.
So, the drill for the next few days should be....Breastfeed every 3 hours, day and night. If baby has been on the breast for 20 mins, take him off, burp, nappy change, wake up and give the other side for 20 mins. Express both breasts - 5-10 mins. Don't feed the milk to the baby - save it.
You may find that you are feeding frequently for a few days - that's OK - your baby has been having quite large bottles and will need to adjust. Already you will probably notice your baby has gained weight and is more organised at the breast. If you are worried your baby hasn't had enough, give him one bottle after his last feed at night - no more than 90 mls. Remember babies feed at least 8-12 or more times in 24 hrs