All the professions you've named are pretty good and needed. Now if you were saying archeologist, zoologist... then I'd be saying good luck!!
justice studies again, paralegal, lawyer or pyschology
I don't know where you live, but all of these things are jobs that aren't "not" needed. If the economy in your region is particularly bad, then you might not get that job exactly, but you'll get something in the field and will eventually get the job you studied for. DOn't let others discourage you from studying. These are professions that should give you a decent job to permit you to live comfortably. If others tell you it's a waste of time and you won't get a job, well tell yourself education is NEVER a waste of time. You'll get a better job with one of those degrees than without one.
If I am not mistaken pharmacists are quite in demand and it's a good paying job. If you like sciences in general (especially chemistry), and have a really good memory, then I'd say go for it. The only difficulty with pharmacy is that there are a lot of drugs to remember by heart, but if you have the will and capacity to learn them, then it shouldn't be a problem!
Good luck and don't worry about what others say. I think it's great you want to go back to school and get an education. :)