Work overwhelm

I start my work week feeling confident and motivated, but I tend to then become quickly overwhelmed when I am getting lots of emails and have back to back meetings. I realize I keep having the thought “this is impossible to keep up with” and I’m struggling to find a replacement thought, because it seems very factually that there is too much to do in the time needed. I could try a thought like “I can make a plan to accomplish what is important” or “it’s okay if I don’t complete everything right away”, but I still feel like there is literally too much to do, those only feel somewhat believable. Is there a different thought I could try or do I need to just keep practicing?