I think what you are going through is normal.

My sister is going through the same thing.

She graduated in December and is still in the part time job she had while in school. She is frustrated and unhappy, not sure what she wants to do.

She ended up breaking up with her boyfriend but that didn't make her happy so don't do anything harsh.

Just be patient until your new 'goal' comes along, whether it a great job or hobby or more school.

Hope you and my sister get through this funk.