Do try and look after your physical and mental health - hydrate, a fast-paced walk everyday, decent diet.
Too, I think as an immigrant you are in a vulnerable position as far as emotional stress/abuse is concerned....and I don't mean this like anyone's spouse is an evil bastard....just that it is easy for the native spouse to not fully grasp the challenges. So, "Hi hun, I'm home...any luck with the job search?" as well-meaning as it may be, can make the vulnerable immigrant feel a bit of a failure.
"You know, hun, my cousin Gemma applied for two openings and got offered both.." can be meant helpfully, but can be tough on someone who just got back a rejection letter.
"You know, maybe you should just drop back and take anything to get in the door," sounds prudent, and can be, it may even be a necessity - but one has to remember that entry level jobs are often the most hard fought for, with the highest volume of applicants....and often these positions nullify experiential/educational advantages.
I will agree with the posters above that keeping a positive attitude is important, but just look after the physical and mental basics during this time of huge adjustment.