You are not alone, @daikym ..... ever since your lump was identified, you've been on a bit of a treadmill 24/7 - in both waking and sleeping hours, as your brain is racing around, even when your body isn't. Sadly the treadmill won't stop for a while yet either xx
Your sleep will definitely be affected too & this means you even wake up tired, too :(
Just try & keep as busy as you can during the day, doing things you love doing, being as physically active as you can be, to help tire yourself out - which hopefully will help you sleep better ...
take care & all the best xx