Thanks HettyAmaretti for the pointer - will repost again, but respond to the replies gratefully received here first.
bumbums - my bubs is 12 days old :)
We were told our latch was good from the get go, but during the feed, baby slips off ever so slightly into a bad latch and I had bloody, scabby, cracked nipples. On day 3, baby went under the blue lights for phototherapy for jaundice and we had to top up expressed feeds with formula to keep his fluids up. This stretched his tummy and we have had a tough time getting my breast milk supply back up (and still not sure I have that right yet?) and taking him off the formula.
I have gone to a breastfeeding workshop at the hospital and had sessions with the advisers there during my 5 days on the wards following a severe third degree tear. I have also since gone to 2 breastfeeding support groups and a lactation consultant came to visit.
Seems I have the latch right and baby is now feeding well, but it is excruciating when he latches, like little shards of glass shooting into my breasts (even if the latch is 'right').
Today, I have noticed the typical white coating over baby's tongue and some nappy rash. Having read around the topic, it seems these are all symptoms of thrush, and that thrush is not uncommon if mom or baby have had antibiotics (which I had three different courses to prevent infection following my 3rd degree tear).
I found the following two articles really informative (in case anyone has a similar situation) - www.bbc.co.uk/dna/h2g2/A810082
and www.breastfeedingnetwork.org.uk/pdfs/BfN_Thrush_leaflet_Feb_2009.pdf
To be perfectly honest, I would prefer if this wasn't thrush, and to keep working on the latch and perfecting that. But poor baby is getting a sore bum rash, a small blister and a white tongue and is more unsettled than usual. While there is a /small/ chance that he might have a tongue tie affecting his latch, I don't want to wait for the other symptoms to worsen before doing anything.....