Dealing with my diagnosis

Yes, totally normal albeit there is no wrong or right way to deal with what you've been through.  First you've recently had a baby, then a cancer diagnosis - stage 2 (as was I) followed by 5-6 weeks of heavy duty treatment.  This is a marathon and some, physically and mentally.  It took me a while to catch up with the toll that treatment took on me; not long after my treatment finished I joined a group class at my local gym as I thought if i just got back into the swing of things life would somehow go back quickly to the way it had been.  With hindsight I think I was half crazy to try and join in with the class - after 5 minutes the teacher came over to me and diplomatically suggested that perhaps I would like to take a chair at the back of the studio and do what I could whilst sitting down.  A few weeks later I tried to join in with a yoga class (I've done a lot of yoga over the years) and well it was just embarrassing as my back was so stiff and painful I could barely do 10% of what the rest of the class was doing. It took experiences like that to finally realise that I had a lot of recovery time ahead of me.  Be kind and patient with yourself - you deserve a medal for what you've been through over the last year or so.