I have never heard that contacts could cause that. I have something similar (but not exactly the same, I don't think) called choroidal neovascularization. It's growth of new blood vessels in the eye to obscure vision. Several doctors told me I would go completely blind (so far I'm mostly blind in only one eye).

I finally found a doctor (Johns Hopkins educated) who knew exactly what the problem was. He told me the likelihood of going blind was there, but it was rare and he gave me the signs to watch for. The point is a good doctor is priceless, your eyesight is too important.

At any rate I know it's a shock, I have been there. It sounds like you are doing ok with it, I wish you the best.