The thing is once the box is open you can't put the lid back on believe me I have tried . You can try and avoid in what ever way you like - you could not go to therapy and pretend it's ok but like you say the flashbacks and nightmares are going to be there , I think trying to avoid it is totally normal after all that is how we've coped in the past - how we got to here .
I know parenting is really hard when you are trying to deal with everything - I have three children and I am separated from their father and at times I feel I am doing a rubbish job but bottom line is I am doing the best I can - most of the time I can click into ' mum mode' and do what ever needs doing . Of course I wouldn't choose to be on this roller coaster trying to bring up children and neither would you but we are where we are . They are loved and cared for - it's not perfect .
I think ( and I could be totally wrong ) that you can see the road ahead in therapy and the big picture and it looks scary and you don't want to go there , I know that feeling , you are tired from your baby and the massive life change that is and you are overwhelmed trying to deal with ptsd on top of everything - it is totally understandable - who wouldn't be struggling faced with all you have on your plate. So don't be down on yourself you love and care for your baby - you are taking steps to help yourself and get to grips with the ptsd - you are doing the right stuff . Just try and break down into little bits - don't get overwhelmed by that big picture . Take little steps .