Is there any solution to the heavy and fast breathing in partial hanging?

[golfmavenice]

I am using a strong shoelace while doing this.
Instructions:
1) I make a snuggle hitch with one end of my shoelace, and make a slipknot with the other end of my shoelace.
2) I put my head in the noose, position the ligature around my carotid artery(above my adam's apple).
3) I push downwards with my head

After doing the third step, I am feeling very very dizzy after 10 seconds and my vision completely blurrs.I didn't feel like my head is going to explode. But I had a very uncomfortable feeling that I am breathing very heavily and fast so I interrupt the process before I pass out.

Is there any medicine to use to ignore this heavy and fast breathing during the process?
Tbh, I don't want to use alcohol because I don't want to look like I am unaware of my actions.

Any ideas would be appreciated.

Thanks

golfmavenice