At my job I have been having allergic reactions to something and I don't think I will be able to work there anymore. Can I collect unemployment until I find a new job? I can't afford not to make money and I also can't keep working where I do.

You will need a doctor to state on record it is your job, and your job will have to refuse to make any changes to allow you to keep working. If you merely say it was your health, no, you have to prove you can't work there for health