Seroquel tapering & withdrawal - Recommendations please!

I'm currently on venlafaxine and mirtazapine and about 3 months ago I missed a venlafaxine dose by accident and I paid dearly for it with the withdrawal, I was given seroquel 25mg twice a day, to take the edge off, over a few weeks I ended up at 75mg twice daily and felt I didn't have any effect on me so my doctor and I decided I'd come off it ,I tapered down to 25mg twice daily and within 3 days I notice intrusive thoughts coming in waves with tension headaches, so by day 4/5 I went back to 50mg twice daily to try slow the taper but the damage was done I went into a withdrawal state of anxiety intrusive thoughts and no sleep so had to go back to doctor today just to explain how everything happened and he decided to increase it back to 75mg twice daily again, has anyone had anything similar happen