Welcome to the forum. Glad to get to know you.
It's natural to feel lost when you are suddenly doing what you see as nothing. Our jobs are a large part of our identity and when we stop it makes a huge hole.
I see you are applying for work which is good. Is it in the same area of the job you left? Workplace relations can be tricky especially when you are just starting out. In my opinion employers should be careful to help a new employee to settle in easily. How long were you working there? It's a pity you could not wait until you had another job. Employers like to know you are working as it gives them more confidence to offer a job.
I suggest you find a volunteer job to help you through this time until you can work again. Look at all the organisations that have branches in your area and see if any of them appeal to you. It's also good to put on your resume as employers like to see some initiative and know the prospective employee is not afraid of working.
Crying may be simply because you feel lost and alone. Look under The Facts at the top of the page and complete the K10 checklist. It's a quick snapshot of your mood etc. Then I suggest you see your GP with the checklist and have a chat about crying. The doc may be able to help you.
The best thing I think is to find some work, paid or unpaid, to keep you feeling good. If you are offered a temporary job think about taking it. You can continue to apply for other jobs.