I was diagnosed with lung cancer late October 2020 and received 5 sessions of SABR radiotherapy which finished at the end of January this year.  After 3 months I had another scan and the tumour had shrunk by approx a third.  Oncology seemed to think this was good news but I had assumed that it would have gone (or not).  I now have another scan and Oncology appointment in September (4 months time).  I am finding this waiting very traumatic, in fact I have had 2 stress-induced heart attacks.  I keep thinking that since the tumour had not gone 3 months after treatment it will now just start to grow or spread over the current 4 month further wait.  Is this just me being negative?  Is there any possibility of further reduction of the tumour?  Has anyone been in a similar situation or is able to reassure me?