Close to orgasm?

I think I get right on the edge of have a P-gasm but it never happens. Usually, I lay on my side with my feet resting on the bed not on each other. I have my head relaxed facing my laptop watching porn. The best way is light and slow contractions for me. I start to feel sensitive, and it feels so good just relaxing there. I am usually semi hard. I am leaking precum at this point. Then get a super hard erection and starts twitching like crazy. My heart starts to race, and I am having involuntary contractions. Nothing else ever happens. My heart rate eventually drops back. My erection and all the contractions go back to normal. I then do this again and again with in every 10-15 minutes. Nothing happens though. I mean nothing that fills explosive like an orgasm.

I read on aneros forums some people claim the same issues but other guys are saying THAT is the orgasm. And they just get better over time.

Have I really reached an orgasm and just need to continue to get the best feeling? What am I doing wrong? I try not to chase it but idk what to do. Just keep going and just enjoy it for what it is? I never tried to abstain from regular masturbation. Maybe I’ll try that. I am also worried maybe my muscles are not strong enough to orgasm or something.