I agree with Gorkhali Jetho. First of, apply immediately for Canadian PR; you can do it yourself without the help of an attorney or you can hire an attorney. I have heard from some people that the process is pretty simple and you being a US PhD holder, it will be easier for you in terms of meeting different requirements and improving your score for the Canadian PR. According to the new Canadian Immigration Rules, it will take anywhere from 1 year to 1 and half yrs for you to get your Canadian PR. Google and check their immigration information for accurate and up-to-date info. If you are seriously thinking abt applying to Canada, you might as well go ahead and perform the FBI check from the US, because the Canada PR process requires this and the FBI check usually takes abt 2 months to complete; so, if you start your FBI check now, you will have every thing ready when they ask for it laer in the process.

Second, apply as many jobs in the US as you can. Trust in the God Almighty and move forward. You will land somewhere. The main thing is, never-ever lose faith in the God and yourself!

Good Luck to you.

PS: If you want to go through attorney for the Canadian PR process, one of the oldest and most popular immigration, who's helped many Nepalese people and who is also in the Canadian Immigration Board is David Cohen. Google his name or something like CanadaImmigration.com and you'll get more info on him.