I have started working at this new job and ive been carrying heavy boxes but then out of nowhere when i would go to sleep i will wake up with my hands numb and then throughout the day their is times when my hands go numb and my fingertips as well?

You should see a doctor, preferably a neurologist if possible, for this problem. You have symptoms of a nerve entrapment syndrome.

Not unique that nerve inflammation or entrapment can occur associated with occupational physical exertion. Carpal tunnel syndrome for example, is not uncommon. As Dr Le recommends, a physical examination can arrive at a diagnosis and a treatment approach.