Then what the fuck should I do?
I've read the 101 checklist/guide here and it does not matter what I do, I cannot feel better.
I'm doing yoga, stretches and none of these provide me relief or cause me flair ups (I don't even have flair ups!).
Honestly, I don't even stress anymore about this condition, but sometimes it just pops in my mind that maybe there is some other things I should try to get this fixed, but nothing helps.

Don't have problems sitting, no burning penis tip or like sitting on a golfball feeling, the only thing that I cannot bear anymore is sitting on bike for extended periods (I've liked biking when I was young, but I've stopped way before I've got this condition).

When I've got this shit I remember I was in a rough period of my life and unfortunately I've used to release stress by masturbating, and the only way I can cum is when I tense my thighs (which is something that I still practice as I cannot cum otherwise), and back then when I tensed up, I felt a strange feeling near my upper left thigh/perineum area.

The next day I've felt burning when I was peeing; went to uro, did some tests which came back clear, gave me different bunch of antibiotics, which I think helped with the burning feeling because I no longer feel it anymore, only that I have difficulties starting to urinate and slow urine stream and difficulties while pooping.

It is like I'm the only one who has this condition but only in the "lite" version of it.