Hi, I too was the same I was really low at points when I was going through my chemo as I was very very poorly and couldn't get out the house as I was always sleeping and when I felt ok to go out I couldn't walk far as I would get so exhausted I would have to come home and sleep! The best thing to do is listen to your body - if it wants sleep sleep - it's majorly annoying but I listened to mine I would even fall asleep whilst having my chemo! I also suffered from really bad sickness and would "cope" as the multi pul anti sickness tablets I had wouldn't work and I regret it now as I made myself so poorly where I couldn't physically eat I put myself in a position where I become so poorly I couldn't walk and become skin and bones (I'm only 5ft 1) - I'm fine now as I had new anti sickness tablets which worked and I haven't been sick for 3/4 weeks now and I've finished my chemo and radiotherapy and I am on my bracatherpy now which doesn't make me sick.
I would have extremely low days where I would just sit and cry - I even planned my funeral as I have advanced cancer - I felt at points like giving up but I knew that I couldn't and wouldn't. I am so glad I had that attitude as my cancer has now shrunk to the size of a pea - once I heard this the darkness lifted and I'm plowing ahead with the last part of my treatment. Don't get me wrong I know it can grow again and I'm fully prepared for that.
I met with my doctor and my mum was with me (she thinks that if you cry your so depressed and you need anti depressants - she over analysis things) and she mentioned to my doctor that I had been down and I too have a history of depression (from the age of 11) I don't take tablets as I know how to deal with it when I get an episode. My doctor was worried about me as I don't really react to things when I was told it was cancer I just said ok and when they thought it has spread and they mentioned stopping treatment I just sat there - I suppose not a normal reaction - so she recommend me to a phychiatrist and I've been today not that I needed to as I am fine. I found that even though I didn't need to go I found opening up about things really refreshing and I felt like a weight had gone from my shoulders. I also learnt some stuff about myself that I didn't know.....although I won't see them again as it's not needed this maybe benifical to you?
Just mention at your next meeting how low your feeling as sometimes talking to someone really does help.