Your boyfriend's mom sounds unpleasant - saying those things to you - so can you arrange that she is not to come to your home again? What do you know about the agency that you worked for - it sounds disorganized or worse? They misrepresented your pay and hours, and never provided you with a copy of the work agreement, and no pay stubs = something's wrong about all this. Even if you don't have things in writing - there is still their verbal agreement with you.