I experienced similar when using HS. I think it somewhat overwhelms the brain and reduces its capability to deal with life. Also consider that any time you tinker with the wiring in your brain (good or bad) everything will seem unstable for a time. Think of mixing up the rocks in your fish bowl. You basically end up with a new paradigm or new wiring and your old way of perceiving doesn't work anymore because you know have different structure. My advice is to re-examine your thoughts, emotions and beliefs that are causing you problems. Very likely you are at odds with them somewhere and your brain is shouting at you to resolve it. You may find that your attitudes and beliefs have changed about things, but unless you examine them you may not notice them indirectly except through the agitation you are now experiencing. I have had this happen to me several times in my journey.
Eric Pepin would say that you are developing a spiritual identity that is clashing with your older identities. They don't accept the new one yet. As the new becomes more powerful and displaces some of the older ones you will feel more at home. This tends to require a lot of self reflection and study to determine where your ideology has shifted and where to.
Hope this helps.
May the Force be with you.
LS
