Hi welcome back Jordie!

I had something that sounds similar or the same happen to me during the later stages of my pregnancy. My blood pressure was always normal and my doc said the symptoms and experiences I described didn't fit any known pattern for anything, including blood pressure problems. I would get all hot, feel sick, feel like I was going to faint, had difficulty focusing etc. It would last about 5-10mins. I never pinned down what brought it on - it happened at work, at home, in the morning, in the evening, while standing, while sitting etc. Still don't know. Take care though and get yourself checked if it keeps happening.