Oh, stretching will work just fine for ya. Keep doing it, be gentle, take your time.
The whole gentle stretching thing works very well in something like 80% of cases of tight foreskin or phimosis. I can see from your pics that you have a tight foreskin (but not phimosis)...totally normal.
If you ever do get a yeast infection, it can be easily treated with the same over-the-counter creams women use...goes away literally over night.
You don't have to be shy about seeing a GP, y'know...they're supposed to help us. If you don't like what the doc tells ya, you can just ignore it or see somebody else.
I was lucky to have a pretty Ukrainian GP when I first tried stretching...it was the first thing she mentioned and she wrote a scrip for steroid cream right then and there. I did ask her about preputioplasty, but she didn't recommend that...said it often doesn't work or may have a bad aesthetic result.
Needless to say, stretching it worked. To this day, while still a bit tight-ish (I like it that way), my prepuce works just fine. Took about three to four months, I think it was, stretching for ten minutes or so every couple of days with the cream. I also stretched it while in the bath or shower. Still do, just to keep things loose.
Good luck to ya.