Hi guys, I have been trying to get into SP for several months now (since March, with about 10-20 tries a month) but I stil haven't succeeded in getting into SP

So what I noticed while trying is that when I'm very (extremely) relaxed, my breathing is almost unnoticeable and I actually get those feelings you get when SP is 'initiating'. However, I saw this as an illusion of the mind due to a shortage of air and such.
A while ago I was googleing this 'sleep breathing' and I noticed a topic on it that stated that when your breathing rhythm is the same as your sleep breathing rhythm, some people may achieve SP faster.

So I now believe that the feeling I felt was the SP initiating and have tried it twice now and both times almost worked. Almost? Yes, almost, because I have bumped into a certain blockade: when I almost get into SP I have the problem that I am still 'awake', so when my body gets this feeling I become a bit excited and my lust for air increases, forcing me to breath faster or inhale more air. But when I try to supress this need for breathing or just let my body do what it wants, SP will be aborted immediately.

It happened one time to me that I was so unaware of me still being awake that my body passed this blockade and got into a farther region of SP, the part where you don't feel 'you' breathing anymore. Since this was the first time this far, I began asking questions: am I still breathing? Why can't I feel anything? Even though I know that the part below your neck get paralysed and I could feel my belly going up and down (breathing). So I 'activated' my brain again and that way I failed to get into SP again.. The last couple of days I tries this again without succes.

Do you have experience with this or know a solution to this problem? Please help!