I am sorry to here about your cancer, but as for your question. Currently you have two options.

1) most states have a risk pool that is required to take you, but it generally is expensive and since your currently don't have insurance in the states you would have to a 12-18 months waiting period to get coverage on the preexisting conditions

2) Consider getting a job that you are able to do that offers benefits. I caution you though that you may run into the preexisting conditions too. So I suggest an HMO plan that dose not have any preexisting conditions.

Hope this helps,

Eleazar Estorga