Law school is awful. I put my husband through. He graduated in the top 5% of his undergraduate class and struggled with his grades in law school. The not being able to work thing almost killed us. I was working a crap retail job that really didn't pay enough. He didn't get any scholarships and now has $150k in student loan debt because we took every cent possible to make sure we had a roof over our head (seriously, DC area is freaking expensive - my paycheck didn't even cover our rent). When he got out, it was right in the middle of this last recession and no jobs were available. He interned with all the public-interest groups who were all in hiring freezes. The situation is pretty bad when you go to a tier I school with no employment prospects afterwards. All the people who got hired when they graduated had family firms and connections, which we had none of. When the freezes ended, they only wanted people fresh out of school. It really didn't prepare him for anything afterwards at all. He does criminal defense and he had to learn pretty much everything. Like right now, he just started a new firm and is learning the civil sides because trying to get people to pay their bills is nearly impossible sometimes. I'm just glad his stuff is doing well enough so that I can go to school full-time and not work, especially since my college is tough (it's an honor's college).
The kicker is, his school keeps begging us for money. We haven't even started paying his loans back. And the fact that they changed their name to "honor" one of the biggest disgraces to the legal profession (and Supreme Court - sorry to get political, but yeah, not happy about that name change) means they can go well.. uh.. yeah. If they had the money to do that, then they don't need the money we don't have.
Relax, breathe, relax. Drink a glass of wine (if that's your thing). Don't go overboard: law school almost made my husband an alcoholic.
Yes, an F can be catastrophic. But it sounds like you've done pretty well other than that class. Fingers crossed for you that it pulls you up over that hump. If they try to kick you out or pull your stuff, appeal it. Explain your situation: your life, stress / mental health factors, etc. They might have programs to help with that (my husband's law school did).
I have to keep a 3.0 to keep my scholarships and get into the graduate program I want to do. The pressure is on there. I feel ya. I couldn't afford to stay in school if it weren't for my scholarships.
Oh, and the way classes are graded are terrible. I remember his grades being determined 100% by the final exam. Nothing else mattered except that exam.