The SSI program has two basic components: (1) being disabled and (2) household income. If you are drawing SSDI and your husband predeceases you, then the administration would evaluate whether you are entitled to some SSI. I think what you are really asking about are widows benefits. In that case you would draw the HiGHER of SSDI based on your own earnings and widows benefits.
You may draw off your x-husbands earnings history. As far as working you may do so and still recieve disability. I believe the amount you can earn has gone up to $1080 this year. The only problem I see is you are more likely to be reviewed for ongoing disability if they see a steady work history. The theory is that if you can work a little perhapsyou could earn more.
The above answer is based upon the limited facts available and there may be other possibilities. This answer does not mean we have formed an attorney client relationship...in other words this is advise, but we do not represent you and you are not our client.
Your question confuses SSI (welfare payments for disabled) with SSDI (disability payments to insured). You cannot get SSI based on someone else's work. You can possibly get SSDI survivor benefits from your ex. Also, you can work part-time on SSDI but not on SSI. SSI.gov gives an explanation of all this.
The information you obtain from this website is not legal advice.
I agree with the above attorneys here. It sounds like you could be entitled to survivor’s benefits. I urge you to consult with a local attorney in your area now, or if you apply and are denied benefits to seek consultation at that point. You do need to be careful about how much you earn… any money close to the cut-off amount can result in your case being reviewed.
This website has a great “Find a Lawyer” tool if you do not know of any in your town. Best of luck to you.