So I reaaaally need a couple of new jeans because I bought some like 4 months ago after losing weight when I though I was back to my normal weight but then I lost a lot more and now my pants are all too big

. It really sucks cos they were expensive and I just can't wear them at all any more. ugh.
on top of that I hate buying jeans cos I have to try on hundreds before I find a good pair.
I also hate it when jeans look great when you put them on when they've just been washed, but then after wearing them once they stretch out (at the knees and ***) because of sitting and stuff...
I want tight jeans (not too tight!!!) and they need to stay tight!
I have pretty long legs and quite slim and I'd like a low rise jeans (but not too low rise cos I hate having to pull them up or showing my underwear the whole time. it's not exactly classy....)
Can you recommend me brands?