it is normal to have anxiety now about tomorrow. this anxiety may cause some problems with sleep tonight. My advice is to not fight it- if you wake up and are pissed you can’t go back to sleep don’t dwell on it, ACCEPT it (i.e. say to yourself, “if I can’t go back to sleep well then I can’t go back to sleep”. Accepting will put you at ease, and hence make it easier to fall back to sleep.
My tip: have s++