when was the last time you used a pre w/o? Could that have brought you up?
I couldn't handle 100mg, i did 50 for a week and now 75 for 2 days and i still feel ok. 150 ed is way out of my tolerance zone.

If you find 150 is too much for you you could try to surge wo days and drop it down a little on your rest days to mitagate the negative effects... just a thought, i'm not sure how effective it would be though. I had considered it for myself but I don't want to push it.