se sentir with adjective

Bonjour Stephen,

You were asked to fill the gap to say 'I feel unwell now' 

Je ____ maintenant  

and were given multiple choices between 

me sens mal / sens mauvais /sens mal / me sens mauvais

Only one fits:

me sens mal.

This is not a freestyle exercise, but of course in everyday situations, you could say different things, including what you suggest and 

Je ne me sens pas bien.

Hope this helps!