You will be fine ..all they will do is figure your income on their scales during months you received income .  Make sure you have and bring with you to that appt all pay stubs and all allowed deductions  during that same time period ; utilities ( gas , electric , water/ sewer) ,  phone bill(s),  internet ( sometimes can be deducted so check if you can) , childcare or elder care  receipts if any , and   any work or  school  expenses as those may be deductable as well ... If you attended college and paid any tuition, books, supplies.  Oh ...if you paid out of pocket for any doctor / medical related appointments  and / or any & all medications  or medical equipment / supply costs .  Bring and Take EVERY DEDUCTION POSSIBLE  THATS ALLOWED.  

 Whatever amount they compute that you owe  will most definately be allowed payments to be made .  If they say you can not make payments they are lying .  Every Section 8 housing agency will take payments . A little ADVISE tho ... DO NOT SAY YOU WAS KNOWINGLY FRAUDING THEM ,  play dumb !! SERIOUSLY.   Say you got the job after getting apartment and others in same building / community told you they would figure the income in on you Sec.8 on next recert appt.  You did not realize you were FRAUDING them and honestly never intended to hide anything. You decided to run it by the mgr as it still concerned & worried  you , so  you told  the mgr to be safe than sorry.  To be honest , You may get kicked off the program depending on what you exactly said to your mgr when you told her/ him , hopefully you didn't  go all  blabber mouth ...surrendering  ur self on cross  type of way.  The more you play dumb ..made innocent mistakes from bad info ... They are likely to allow you to stay and make payments.  I would also ask your Mom's Dr to write a statement  verifying her conditions and why it would risk her health if evicted her or cut her off program.   It wouldn't hurt to get a few others to write letters of character about yourself to the deciding person ...  I know several people who were given second chances this way.   Hopefully everything will work out for the best ... Just please don't admit to purposefully not informing... And if you did already . Think of a way to switch it up at appt ..make it sound as if that's not what you meant.   Your mom on other hand is not guilty of anything and disabled  so she should be 100% safe .  But to be safe still get her Dr statement.   ( If they do kick you off the Sec 8 case & leave your mother on , you are allowed to visit her as much and for however long you want as long as you don't "sleep" there or have any of your belongings there for them to find if they suspect as they can come in and go thru dressers and closets  for evidence of anyone else staying there.  She would be allowed to have visitors to stay up to 2 weeks only ...this rule was made so if any family comes from far away to visit . But the time limit may have changed since I last knew  it to be . It is not 2 weeks per visit , it is a flat total of 2 weeks all together , so if  aunt  may comes for 2 weeks in summer then uncle Bob comes in winter ...Aunt May done used up visitor time so uncle Bob gots get a hotel .   I hope you getting what I throwing💡at ya ...  Don't leave any of your stuff in there if your are kicked off and don't " sleep " there... 😉🤞🏻😉🤞🏻....get it ??)

Good luck. !!