Probably not, but it depends. If you work for a company that has more than 50 people, you are entitled to FMLA coverage, which means you can be out for 3 or 4 months (I forget which) without any repercussions from your boss (i.e. - they cannot fire you). If you're in a smaller company, you may need to use sick time and vacation time to have enough time away, or take some of the time unpaid. Having said all this, if you need to be inpatient, you need to be inpatient and it doesn't really matter what happens to the job. Your life is worth more than any stupid employer.

I hope you get the help you need - either inpatient or out.
Bub