Look, as I said, a photo is never going to compensate for someone actually examining you, and if the physio who has seen you says you have a prolapse, then she is able to pass better judgement than I can from a photo.
But honestly, it really doesn't look that awful! Yes, it looks pretty much par for the course for someone who's had a baby! Now that you've seen the physio, hopefully she's given you some more targeted exercises that should help you feel more comfortable.
Part of the problem is that most women don't know what the normal range of women's genitalia looks like. Men can see other men's dangly bits whenever they're in the gym changing room, or communal showers after a match, or or or. Most women can only see other women's bodies by looking at porn, and the vaginas and vulvae that you see there are a very artificial representation of women's bodies. They show what's fashionable in porn at that time, not what the real range is., and some (many?) will have been surgically altered just like the boobs have. I mean, you say that your friends say there bodies "have gone straight back after children" but this sounds like something of a miracle to me! And I'll bet you haven't actually been able to compare before-and-afters in the flesh, so to speak, have you? If you did, you'd probably find they are all different --
If this really starts to rule your life, then I'd wonder if you're subconsciously displacing some of your anxiety about other problems onto this too. Please think about speaking to someone about your mood if you're feeling bad, quite seperately from the questions about prolapse.