Hi, I think the mental struggle has been really hard - particularly towards the end of chemo. So my only advice is take it one day at a time....and rest, rest, rest.
You'll find your 'inner strength' and get there. I have a few 'go-to' songs that help lift me at times. My friend who has gone through chemo recently used to listen to Rachel Platten's 'Fight Song' when she needed a pick me up.
Know that lots of us have gone and are going through what you are going. So use this forum to share and I hope lots of others give you advice/tips etc.
Cheers