Strange Episode

I am very confused as to what happened today. I was walking in the mall with my family holding onto my dad when we both hit a slightly raised bump in the walkway. As soon as I hit it, I immediately felt very off. I started getting tunnel vision, my limbs felt extremely heavy and super tense, and my heart rate increased. I had extreme tunnel vision and can’t quite remember what I told my family at the time. I thought I was okay after a couple seconds but then I tried to continue and I felt a wave hit me again and everything felt very wrong. Something I’m never felt before in my life. It felt like impending doom in a way. I was told that my skin looked flush all of the sudden and right after that my fingers got ice cold and clammy. I work on the ambulance so I have an understanding of medical related things. I am 20YOF, 170 lbs. I have had plenty of food to eat that day, not too full and not hungry (I’m not a diabetic). I’ve had plenty of water. It wasn’t hot because I was in a climate controlled area. My sister who was also with me and is deeply involved in the medical field did a stroke test and found it to be negative. I did not have a recent head injury and I’m not pregnant. I only take my birth control and I took ibuprofen earlier today because I had a headache as soon as I woke up this morning. I don’t have any health conditions (knock on wood). I have had recurring sinusitis multiple times where I would have it for about 2 weeks each month, for a few months straight, and there were points during those sicknesses where I had bad vertigo and felt like I would occasionally drop even if I was sitting. That is long gone and I haven’t had a sinus infection in a long time. My blood pressure can sometimes be on the higher side. Usually it’s 135-140 systolic but recently I’ve been tracking it at around 117-120. When I sat down after this I immediately felt my carotid and felt an increase in heart rate. Have there been any studies of random and quick changes in heart rhythm cause near syncope, or vertigo episodes after hitting a bump the wrong way? I’m extremely confused.