Dude, if you want to keep seeing your kid, quit tweaking the nights before you take care of your child.
Mothers do not take well to this kind of behaviour. Your judgement will be affected, even if you do not think so. Keep your use to days that do not border on the ones where you will be babysitting. Your tolerance, family, and sanity will thank you.
Even if you don't get any numbness, or angina perctoris, or whatever else you have experienced in the past does not make this vasoconstriction in any way safe. If it is doing this to surface vessels, imagine what it is doing to those deep-lying ones. The important ones in your brain etc...
I would call it quits for now, man.
You can pick it up another day. Just shit, shower, shave, eat, drink, and sleep.