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 ass) 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?