Any anti-depressant, should be weaned off of since we are all different and may react differently if it is stopped abruptly. If you have already stopped it, and aren't having any problems, then you are fine. I do agree that you proably wouldn't have any significant problems stopping it abruptly, but always better to be safe. Anti-depressants are known to kill your sex drive, but you can be given something that counteracts this side effect. Some people have gained weight on Prozac, I didn't.
10 mg is a very very very small dose. Starting dose for Prozac is 20mg.
It is not dangerous to just stop. Is there something else you can take for your anxiety or depression? Is it possible your weight gain, dizziness or lack of sex drive is due to your anxiety or depression itself and not from Prozac at all? That is a very small dose to have any side effects.