In search of jeans!!

I am in desperate need of jeans! I grew 6 sizes since last year, due to a thyroid disorder. I’m now a size 5-7 depending on the brand! I really need a cheap deal! Less than thrift store prices!! Goodwill is 8$ for jeans which is too much for the amount of jeans I need. I love American eagle jeans a lot, which I need size 6 in possibly a 4.., but am open to ANY type!! Please let me know what you have it would be so much appreciated!