Feel like doing nothing

I worked at an early stage startup with really toxic culture and left my job because of that, now it's been one month I just wake up eat and sleep and feel like doing nothing, Although I know at some point I have to resume back but when ever I sit back to document my work prepare my portfolio I just feel no motivation to do so, Is something wrong with me?? Has anyone faced something like this before? How did you come out of it?