Left my job, what now?

I left my first, I worked there for 3 months. I had to leave my job after being hospitalized due to unrelated incidents and all I can think is, "How will I get another job after I recover?" How do I update my resume? Will I even be employable, my previous employer doesn't know i left because I was hospitalized so how will I even explain why i left after 3 months to a new employer? I'd really appreciate any advice you can give me, and just to clear things up, I'm 22, not in collage atm, and I'm ok now, I've been out of the hospital for a week now I just need some follow up appointments at this point.

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