Modafinil, Shortage of Oxygen?

[Butters]

So I noticed that when I go out in public on the day, or the day after I've taken modafinil, I'm more likely to get mild panic attacks as a result of what feels like depersonalization.  

I've also noticed that when I do the WIm Hof breathing on those same days, it is much more effective than usual, meaning I feel much more light-headed and more tingling while doing the method. 

Has anyone noticed anything similar to this? Also, Moda gives me tension and restless physical behavior (tension in the muscles) throughout the day. It is not unpleasant but it is technically the definition of stress. 

Edited March 24 by Butters