Hello i'm a 20 yr old female who thought her life going for her lately i finally got a job and yet...?

lately i haven't been able to get rid of this unsettling feeling inside i thought after i got a job i wouldn't feel down but it wasn't the case i work then come home not even wanting to "hang out" with my co-workers i just feel like being around people no more then i have to everyone seems to grate my nerves i know it not them but lash out anyway