Hi there Sally,
Well i don't think after what you & all of us have been through that anything will be quite "normal" again. It's more like a "new" normal, at least for me it is, these days.
You have been through an awful lot in one year with your dad passing away then 5mths later you're diagnosed.............you would've still been grieving & then "bang" your treatment begins & your focus has to be on you & getting through it all & somehow coping emotionally as well as physically. It's a huge process & also added in is fear of the unknown.
Now it's like ...everything has stopped & slowed down & you're trying to get your life back to "normal" with going back to work etc, but it just doesn't feel the same anymore hey? Not to mention quite often other people don't understand your feelings.
Hard to explain but feeling down is very common Sally ( i did & still do at times & i'm over 7mths out of treatment) & you will find plenty of people on this site who have a lot more experience than i do on the subject, so feel free to express your emotions anytime you like.
Cyber hugs Mez 🙂