Pulse

In my science class we did a small lab measuring our pulses since tomorrow we have exams and there wasn't anything else to do 

For most people this would be fine, but apparently not for me 

I don't know why, but thinking about or trying to find my pulse always freaks me out 

Normally i have the chance to stop thinking about it because it's just a random thought but obviously since this was a lab I had to keep thinking about it 

My teacher was understanding and i didn't get in trouble because i ended up just not doing it because i started crying, but it's still weird 

I have no idea why I have such a strong reaction to thinking about or trying to find my pulse 

There's no traumatic experience or anything like that, i guess I'm just weird 

It might be a sensory thing but idk