Hi leanne,
Obviously I can't say for sure but it does sound like some kind of panic attack, I have had similar experiences especially the out of it 'weird' feeling which seems like 'out of this world' - do you relate to that?
I think first try to calm down and avoid overanalysing things, it probably won't be the most productive. I usually just try and watch out for when my mind is in its bullshitting mode and let it run out.
If you are able to calm yourself down - try to figure out what to do next, how badly do you want to see a doctor? You could go to a walk-in centre to put your mind at ease. If not, try and distract yourself and avoid googling symptoms, this will just make it worse. Breathing and grounding exercises seem like they would be particularly helpful.
I personally really doubt that there is something seriously wrong (besides anxiety obv) , so you can have my assurances if that helps.
Hope it all goes ok, and please feel free to share more if you'd like.
- EM
