Panic Attacks vs. Seizures (Deja Vu)

I've been experiencing something strange for the past couple of months now that I initially put down to my general anxiety. I'm not unused to panic attacks so this new thing just seemed par for the course - I'll suddenly feel a little dizzy and get this intense feeling of deja vu while my brain kind of runs through dreams I may have had, before eventually I'll restart the thing and realise that I never had that dream quickly followed by complete amnesia of the images my brain was seeing - which is confusing at best. The worst part is that if I'm stuck too long I feel worse and worse, my heart rate increases, I can't concentrate on anything, I get really dizzy and it feels difficult to breathe. Afterwards I usually have a headache for half an hour or so. However I've been questioning this month if this is a panic attack at all. It ranges from a sudden flash and barely bothers me to a full blown attack, often multiple times a day. I'm never really in a stressful situation when this happens and haven't felt any more stressed than usual these past few months. If anything these happen stronger when I've been walking or travelling around. This website came up frequently when I was searching for others with similar experiences. Any ideas how I should word all this to a doctor for them to decide if this is just part of my anxiety? I have issues with doctors and will put off even the most severe things.