Do you have a work colleague that supported you after your breast cancer diagnosis?

Hi all, I also work for Ed dept as an early childhood teacher. I used up most of my sick leave immediately following lumpectomy then worked as much as I could through radiation but took some extra sick days when I was really tired. My seniors have been super supportive,  especially in the early days, although I was expected to go straight back on class. They are still supportive,  but I find as time goes on (3 years on Tamoxifen)I sense frustration when I am really fatigued and battling with full time work. I really think that if I'd had the opportunity to return to work in an off class position,  then I would have been able to build my strength and stamina a bit. I also still have a mortgage, an the main income earner so need to work as many days as i can. Would love my pre cancer energy back!!