Not really sure where to start so I think I'll just write what's in my head...Please bear with me!
DD is 2.4; she was prem (had IUGR) and spent 10 days in NICU/SCBU when she was born. A combination of the trauma of her birth (EMCS), being separated from her soon after she was born, difficulties with bonding (took well over a year), difficulties with breastfeeding, severe sleep deprivation (still ongoing as DD is a very early riser) AND issues from my childhood (mainly emotional abuse) caused me to have PND - was put on ADs and had counselling.
Anyway, we've not hit the "Terrible Two's" although tbf it's not really what she's doing as such, more that sometimes I just feel I don't have the patience to deal with it (not sure if that's just normal or the pnd coming back - am off ADs now). I feel completely incapable of looking after another child, but also feel very guilty if we don't as I don't want DD to miss out on having a sibling - I do have a good network of friends who all have children around her age and I do take her to groups too so she at least mixes with other children.
I don't know really what to think. The idea of having another one scares me, but is it unfair on dd for her not to have a sibling? On the other hand, if we didn't have anymore then we could offer her so much more in terms of experiences - I'm thinking holidays, nurturing talents etc (although I do not intend to be Pushy Parent No1 here!). I really don't know what to do so I thought I'd post here and ask for advice.
I hope I've posted enough here - don't want to drip-feed! Oh and I may not reply straightaway - trying to get an early night in case DD gets up at 3.30 again like she did this morning 
TIA 