Would my attempt have failed?

[joegoes100]

I've recently attempted twice using partial suspension hanging. I tied a bedsheet slip knot to a pull up bar in my doorframe both times. (I have a broken collarbone and can't use my left arm fully so it was hard to tie.) the first time I attempted I didn't feel my self losing consciousness so I stopped, however it left a visible mark on my neck I will attach below. I feel like I might've placed it in the wrong
First attempt


First attempt mark

Second attempt, didn't leave a mark.
spot?
I'm also curious if my second attempt would've worked. I tied the knot a lot better this time, but after a rough 15 seconds I really didn't feel any change in my well being, so I untied the knot after struggling a little bit with my one arm and thought I'd do more research. I'll list the image of the two setups below. I used a bedsheet for both attempts but rolled it differently in both attempts. Used a slip knot both times. I wanna know that if I waited longer would either attempts work? If not, what should I change? Thank you
Didn't mean to put the images right in the middle of my paragraph!!! Sorry!!!

 

[BullsDon'tFly]

I'd say that bedsheets are not ideal since their pressure applying surface may vary from time to time and relative position to the neck, etc.
I don't understand why people outside prison are so reluctant to buy a rope. Trying to hang yourself wrong can result in serious damage. Don't risk to end up suffering more than now...