That's harsh xD
To combat Genjutsu, i need to discover that i'm actually trapped in it, to i should use logic evidences and notice odd things that changed, i mean i can't be in a grassy field and find myself in a mansion or a prison of mirrors just like that, the other thing is noticing the hand-seals, if the enemy used some hand-seals and then after executing the jutsu i found myself in a bizarre place, or something odd happened like seeing dead people... I should definitely notice and know for sure that i'm trapped in a Ganjutsu.
Now i need to get out of the Genjutsu, and to do that i'll use pain, like stabbing myself, injuring myself or burning myself using a fire technique.