I hate my job. i have nightmares about it.?

i work as a pharmacy technician and i get paid $7.85. i work about 30 -38 hrs every week. and everyday i dread going to work. i feel severely underpaid and overworked. i also always seem to be stuck helping the customers while everyone else gets to do other things. and i'm afraid to say anything because i've only been there 3 months. but there are days that i just want to give up and walk out. what should i do? finding another job is out of the question.