Your wedding is in 6 weeks? Yikes...I don't know that any reputable seamstress will have time. Where did you buy your dress? Using them might be your best bet now.
ETA - I just looked on Angie's List. This one gets good reviews, but I know nothing of it personally
Tailoring by Ginny
8140 SW Larch St Portland OR 97223
503) 246-1655
Also, it'd be worth calling Kathi again and seeing who she recommends in her stead.
I recommend a different Kathy. Kathy Hayes. She can do anything! Not only did she do all my dress alterations, she made me a bolero jacket, veil and a garter. All costume. Give her a call at 503-621-6385 Her prices are great and I promise you won't be disappointed.
Re: Dress Alterations
ETA - I just looked on Angie's List. This one gets good reviews, but I know nothing of it personally
Tailoring by Ginny
Portland OR 97223
503) 246-1655
Also, it'd be worth calling Kathi again and seeing who she recommends in her stead.