Oh I feel for you. I remember when I first got progressives; the learning curve was steep, but eventually I did get used to them. Do go back and make sure they are the right prescription (I had a bad one from Sears too) and that they are sitting on your face correctly. If they're off the tiniest bit it can make a difference in how you see.

Now my Rx is so strong it can't be put into the newer, smaller frames, so I have two pairs of glasses - one for reading/computer stuff and the other for distance.