Sorry you're having this problem, missys. For what it's worth, there were two or so other threads on bedwetting which occurred in the past months--might be worth a look through the archives.
I'm not sure what the current "treatments" are or how well they work, but I think they were touched upon in those other threads.
I was a bedwetter (inherited from my dad) and the problem did eventually sort itself out. In the 70's it was quite popular to put kids on a low dose of antidepressants to stop bedwetting, because it allowed children to sleep less deeply so they could wake themselves when they had to urinate. These were old-fashioned anti-depressants, not SRI's, and the tablets gave me a very rare side-effect of heart arrhthmia which, in some children, can be fatal (I was lucky). So eventually I used nothing--I just grew out of it by12 or 13, with the bedwetting becoming gradually less frequent until it tapered off completely.
I'm not sure why my parents didn't want to try one of those alarms which sort of "train" the brain to wake up at the first hint of moisture. I wonder if those are still in use and, if so, if they have a good success rate.
I always worried about "accidents" at sleep-overs, but I never had one. I would be extra careful about restricting my fluids, and somehow my brain just knew at some level that I needed to sleep less deeply. (Or maybe it was luck.)
Anyway, these years may seem long, but it should all be OK in the end. Have you seen the gp about this? What do they say? Sorry that I can't give any practical advice.