Increasing dosage of venlafaxine on my own

Hi there ive been on venlafaxine 75mg for 5 months now and are semi great anxious on times nd super angry on times especially lately, my doctor doesn't want to increase the dose dunno why, so im doing it on my own nd just started doubling it to be 150 mg per day for the next 15 days until the refill time nd im risking another 15 days withdrawal from it lol it sound stupid but i wish i could reach for him nd refill my venlafaxine to prevent to brainzaps thats what im afraid of the most. I need advices nd im so not patient to the next appointment thats why im doing this