@joeylittle My first thought is low blood pressure and/or heart rate.
While I don't face it daily.. It happens more than I want to remember - Yet not as common as you. Once right before meeting with psychiatrist who also does psychotherapy. I was on a nature trail/park near her office to relax...then I went "out" briefly...I remember walking on trail...sensing threat from someone approaching...then I decided they were no threat..then it goes very blurry/fuzzy...I went out - I was standing entire time (not sure how)....then opening eyes - had no ideal if I would be able to find my way to her office in time (takes 3-4 weeks to get an appointment...several months to find her.) I didn't even understand where I was.. It was like waking-up - lost and confused...(I love nature and very good at finding places so this made no logical sense.) All I knew was I suppose to be going to her office and it was safe there. Yet I was lost...Didn't remember how I got to that point in park or where I was...
Maybe this will help you. I told her the experience end of meeting. She told me she needed to know about such things at start of meetings.. I guess she was concerned it was the medicine I was on, but it wasn't that. She was very concerned, kept me longer, asked me several questions, and finally told me "there are things you shouldn't be thinking about unless in safety of my office or another very safe place....." Guess that goes to power of thought...
I've also had it happen randomly.... I guess..once in a coffee shop. I remember kinda fading, I was suppose to be paying for coffee...I remember being in line, ordering and suppose to be paying...then kinda waking-up...Barista kept asking me, "Are you ok??? Are you ok?!?" I just remember blurry and fuzzy. I must have been close to fainting or in the motions of it....
Joey while you are most likely in or near Zagreb - I hope you make it to the sea to relax. Ocean, or seas, can do wonders to help one relax and heal. Or even forget everything for awhile. Sometimes a few moments of peace are worth more than any therapy...