Baby blues vs postnatal depression

Am
When do the baby blues become pnd? My little girl is 2 weeks old and I ended up going basically the whole way through labour .. 2 hours of pushing nonstop being told the baby was stuck too high up and had an emergency csection I was pretty out of it for a few days but I feel no bond with her at all she's my second I just feel resentment because I can't do anything with my son I can't even pick him up and give him a squeeze even writing this I can feel my eyes tearing up I just feel so down I didn't do any of the firsts with this little girl it feels like she isn't even mine sometimes I don't know what to do anymore this isn't at all how I wanted to be I coulebt even breastfeed due to the amount of drugs in my system.. I had two failed epidurals a spinal and have been on copious amounts of painkillers to get me through the day please someone tell me what to do